Common use of Duration and Exercise of Warrant Clause in Contracts

Duration and Exercise of Warrant. (a) Subject to Section 1.2, this Warrant may be exercised to purchase (i) 50% of the underlying shares from and after 9:00 A.M. New York City time on January 24, 2002 (the "First Exercise Date") and (ii) 50% of the underlying shares on January 24, 2003 (the "Second Exercise Date"). Each of the First Exercise Date and the Second Exercise Date are hereinafter referred to from time to time, as applicable, as the "Exercise Date" and collectively from time to time as the "Exercise Dates"). The Company shall give prompt notice to the Warrantholder of the Exercise Date in accordance with Section 7.6. This Warrant expires at 5:00 P.M., New York City time on January 24, 2011 (the "Expiration Date"). (b) The rights represented by this Warrant may be exercised by the Warrantholder of record, in whole, or from time to time in part, by (a) surrender of this Warrant, accompanied by either the Exercise Form annexed hereto, or if the Warrantholder decides to exercise the Warrant pursuant to the broker-assisted cashless exercise program instituted by the Company, an applicable exercise form provided by the Company (the "Exercise Form") duly executed by the Warrantholder of record and specifying the number of Warrant Shares to be purchased, to the Company at the office of the Company located at ▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇, Suite 1000, Dallas, Texas 75204 (or such other office or agency of the Company as it may designate by notice to the Warrantholder at the address of such Warrantholder appearing on the books of the Company) during normal business hours on any day (a "Business Day") other than a Saturday, Sunday or a day on which the New York Stock Exchange is authorized to close or on which the Company is otherwise closed for business (a "Nonbusiness Day") on or after 9:00 A.M. New York City time on the applicable Exercise Date but not later than 5:00 P.M., New York City time, on the Expiration Date (or 5:00 P.M., New York City time, on the next succeeding Business Day, if the Expiration Date is a Nonbusiness Day), (b) delivery of payment to the Company in cash or by certified or official bank check in New York Clearing House Funds, of the Exercise Price for the number of Warrant Shares specified in the Exercise Form (such payment may be made by the Warrantholder directly or by a designated broker pursuant to the broker-assisted cashless exercise program instituted by the Company) and (c) such documentation as to the identity and authority of the Warrantholder as the Company may reasonably request. Such Warrant Shares shall be deemed by the Company to be issued to the Warrantholder as the record holder of such Warrant Shares as of the close of business on the date on which this Warrant shall have been surrendered and payment made for the Warrant Shares as aforesaid. Certificates for the Warrant Shares specified in the Exercise Form shall be delivered to the Warrantholder (or designated broker, as the case may be) as promptly as practicable, and in any event within 10 business days, thereafter. The stock certificates so delivered shall be in denominations of at least 1,000 shares each or such other denomination as may be specified by the Warrantholder and agreed upon by the Company, and shall be issued in the name of the Warrantholder or such other name as shall be designated in the Exercise Form. If this Warrant shall have been exercised only in part, the Company shall, at the time of delivery of the certificates for the Warrant Shares, deliver to the Warrantholder (or designated broker, as the case may be) a new Warrant evidencing the rights to purchase the remaining Warrant Shares, which new Warrant shall in all other respects be identical with this Warrant. No adjustments or payments shall be made on or in respect of Warrant Shares issuable on the exercise of this Warrant for any cash dividends paid or payable to holders of record of Common Stock prior to the date as of which the Warrantholder shall be deemed to be the record holder of such Warrant Shares. (c) With the consent of the Compensation Committee, and subject at all times to, and only to the extent, if any, permitted under and in accordance with, laws and regulations and other binding obligations or provisions applicable to the Company, the Company may make a loan to the Warrantholder with respect to the exercise of the Warrant, including the payment by the Warrantholder of any or all federal, state and local income or other taxes due in connection with any exercise. The interest on such loan shall be the Company's cost of money plus an additional 0.5% at the time the loan is made and such loan shall be made with recourse against the Warrantholder. The Compensation Committee shall have the full authority to determine any other terms and provisions of such a loan.

Duration and Exercise of Warrant. (a) Subject to Section 1.2, this This Warrant may be exercised to purchase (i) 5020% of the underlying shares from and after 9:00 A.M. New York City time on January 24February 25, 2002 2001 (the "First Exercise Date") and ); (ii) 5020% of the underlying shares on January 24February 25, 2002 (the "Second Exercise Date"); (iii) 20% of the underlying shares on February 25, 2003 (the "Second Third Exercise Date"); (iv) 20% of the underlying shares on February 25, 2004 (the "Fourth Exercise Date"); and (v) 20% of the underlying shares on February 25, 2005 (the "Fifth Exercise Date") to and including 5:00 P.M. New York City time on February 25, 2010 (the "Expiration Date"). Each of the First Exercise Date, the Second Exercise Date, the Third Exercise Date, the Fourth Exercise Date and the Second Fifth Exercise Date are hereinafter referred to from time to time, as applicable, as the "Exercise Date" and collectively from time to time as the "Exercise DatesDate."). The Company shall give prompt notice to the Warrantholder of the Exercise Date in accordance with Section 7.6. This Warrant expires at 5:00 P.M., New York City time on January 24, 2011 (the "Expiration Date"). (b) The rights represented by this Warrant may be exercised by the Warrantholder of record, in whole, or from time to time in part, by by: (ai) surrender Surrender of this Warrant, accompanied by either the Exercise Form annexed hereto, or if the Warrantholder decides to exercise the Warrant pursuant to the broker-assisted cashless exercise program instituted by the Company, an applicable exercise form provided by the Company (the "Exercise Form") duly executed by the Warrantholder of record and specifying the number of Warrant Shares to be purchased, to the Company at the office of the Company located at ▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇, Suite 1000900, Dallas, Texas 75204 (or such other office or agency of the Company as it may designate by notice to the Warrantholder at the address of such Warrantholder appearing on the books of the Company) during normal business hours on any day (a "Business Day") other than a Saturday, Sunday or a day on which the New York Stock Exchange is authorized to close or on which the Company is otherwise closed for business (a "Nonbusiness Day") on or after 9:00 A.M. New York City time on the applicable Exercise Date but not later than 5:00 P.M., New York City time, P.M. on the Expiration Date (or 5:00 P.M., New York City time, P.M. on the next succeeding Business Day, if the Expiration Date is a Nonbusiness Day), , (bii) delivery Delivery of payment to the Company in cash or by certified or official bank check in New York Clearing House Funds, of the Exercise Price for the number of Warrant Shares specified in the Exercise Form (such payment may be made by the Warrantholder directly or by a designated broker pursuant to the broker-assisted cashless exercise program instituted by the Company, subject to subsection 1.5 herein) and and (ciii) such Such documentation as to the identity and authority of the Warrantholder as the Company may reasonably request. Such Warrant Shares shall be deemed by the Company to be issued to the Warrantholder as the record holder of such Warrant Shares as of the close of business on the date on which this Warrant shall have been surrendered and payment made for the Warrant Shares as aforesaid. Certificates for the Warrant Shares specified in the Exercise Form shall be delivered to the Warrantholder (or designated broker, as the case may be) as promptly as practicable, and in any event within 10 business days, thereafter. The stock certificates so delivered shall be in denominations of at least 1,000 one thousand (1,000) shares each or such other denomination as may be specified by the Warrantholder and agreed upon by the Company, and shall be issued in the name of the Warrantholder or or, if permitted by subsection 1.5 and in accordance with the provisions thereof, such other name as shall be designated in the Exercise Form. If this Warrant shall have been exercised only in part, the Company shall, at the time of delivery of the certificates for the Warrant Shares, deliver to the Warrantholder (or designated broker, as the case may be) a new Warrant evidencing the rights to purchase the remaining Warrant Shares, which new Warrant shall in all other respects be identical with this Warrant. No adjustments or payments shall be made on or in respect of Warrant Shares issuable on the exercise of this Warrant for any cash dividends paid or payable to holders of record of Common Stock prior to the date as of which the Warrantholder shall be deemed to be the record holder of such Warrant Shares. (c) With the consent of the Compensation Committee, and subject at all times to, and only to the extent, if any, permitted under and in accordance with, laws and regulations and other binding obligations or provisions applicable to the Company, the Company may make a loan to the Warrantholder with respect to the exercise of the Warrant, including the payment by the Warrantholder of any or all federal, state and local income or other taxes due in connection with any exercise. The interest on such loan shall be the Company's cost of money plus an additional 0.5% at the time the loan is made and such loan shall be made with recourse against the Warrantholder. The Compensation Committee shall have the full authority to determine any other terms and provisions of such a loan.

Duration and Exercise of Warrant. (a) Subject to Section 1.2, this This Warrant may be exercised to purchase (i) 50% of the underlying shares from and after 9:00 A.M. New York City time on January 24February 25, 2002 2001 (the "First Exercise Date") ); and (ii) 50% of the underlying shares on January 24February 25, 2003 2002 (the "Second Exercise Date") to and including 5:00 P.M. New York City time on February 25, 2010 (the "Expiration Date"). Each of the First Exercise Date and the Second Exercise Date are hereinafter referred to from time to time, as applicable, as the an "Exercise Date" and collectively from time to time as the ."Exercise Dates"). The Company shall give prompt notice to the Warrantholder of the Exercise Date in accordance with Section 7.6. This Warrant expires at 5:00 P.M., New York City time on January 24, 2011 (the "Expiration Date"). (b) The rights represented by this Warrant may be exercised by the Warrantholder of record, in whole, or from time to time in part, by by: (ai) surrender Surrender of this Warrant, accompanied by either the Exercise Form annexed hereto, or if the Warrantholder decides to exercise the Warrant pursuant to the broker-assisted cashless exercise program instituted by the Company, an applicable exercise form provided by the Company (the "Exercise Form") duly executed by the Warrantholder of record and specifying the number of Warrant Shares to be purchased, to the Company at the office of the Company located at ▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇Avenue, Suite 1000900, Dallas, Texas 75204 (or such other office or agency of the Company as it may designate by notice to the Warrantholder at the address of such Warrantholder appearing on the books of the Company) during normal business hours on any day (a "Business Day") other than a Saturday, Sunday or a day on which the New York Stock Exchange is authorized to close or on which the Company is otherwise closed for business (a "Nonbusiness Day") on or after 9:00 A.M. New York City time on the applicable Exercise Date but not later than 5:00 P.M., New York City time, P.M. on the Expiration Date (or 5:00 P.M., New York City time, P.M. on the next succeeding Business Day, if the Expiration Date is a Nonbusiness Day), , (bii) delivery Delivery of payment to the Company in cash or by certified or official bank check in New York Clearing House Funds, of the Exercise Price for the number of Warrant Shares specified in the Exercise Form (such payment may be made by the Warrantholder directly or by a designated broker pursuant to the broker-assisted cashless exercise program instituted by the Company, subject to subsection 1.5 herein) and and (ciii) such Such documentation as to the identity and authority of the Warrantholder as the Company may reasonably request. Such Warrant Shares shall be deemed by the Company to be issued to the Warrantholder as the record holder of such Warrant Shares as of the close of business on the date on which this Warrant shall have been surrendered and payment made for the Warrant Shares as aforesaid. Certificates for the Warrant Shares specified in the Exercise Form shall be delivered to the Warrantholder (or designated broker, as the case may be) as promptly as practicable, and in any event within 10 business days, thereafter. The stock certificates so delivered shall be in denominations of at least 1,000 one thousand (1,000) shares each or such other denomination as may be specified by the Warrantholder and agreed upon by the Company, and shall be issued in the name of the Warrantholder or or, if permitted by subsection 1.5 and in accordance with the provisions thereof, such other name as shall be designated in the Exercise Form. If this Warrant shall have been exercised only in part, the Company shall, at the time of delivery of the certificates for the Warrant Shares, deliver to the Warrantholder (or designated broker, as the case may be) a new Warrant evidencing the rights to purchase the remaining Warrant Shares, which new Warrant shall in all other respects be identical with this Warrant. No adjustments or payments shall be made on or in respect of Warrant Shares issuable on the exercise of this Warrant for any cash dividends paid or payable to holders of record of Common Stock prior to the date as of which the Warrantholder shall be deemed to be the record holder of such Warrant Shares. (c) With the consent of the Compensation Committee, and subject at all times to, and only to the extent, if any, permitted under and in accordance with, laws and regulations and other binding obligations or provisions applicable to the Company, the Company may make a loan to the Warrantholder with respect to the exercise of the Warrant, including the payment by the Warrantholder of any or all federal, state and local income or other taxes due in connection with any exercise. The interest on such loan shall be the Company's cost of money plus an additional 0.5% at the time the loan is made and such loan shall be made with recourse against the Warrantholder. The Compensation Committee shall have the full authority to determine any other terms and provisions of such a loan.

Duration and Exercise of Warrant. (a) Subject to Section 1.2subsection 1.3, this Warrant may be exercised to purchase (i) 5033 1/3% of the underlying shares from and after 9:00 A.M. New York City time on January 24March 16, 2002 2001 (the "First Exercise Date") and ); (ii) 5033 1/3% of the underlying shares on January 24March 16, 2002 (the "Second Exercise Date"); and the remaining (iii) 33 1/3% of the underlying shares on March 16, 2003 (the "Second Third Exercise Date") to and including 5:00 P.M. New York City time on March 16, 2010 (the "Expiration Date"). Each of the First Exercise Date, the Second Exercise Date and the Second Third Exercise Date are hereinafter referred to from time to time, as applicable, as the "Exercise Date" and collectively from time to time as the "Exercise Dates"). The Company shall give prompt notice to the Warrantholder of the Exercise Date in accordance with Section 7.6. This Warrant expires at 5:00 P.M., New York City time on January 24, 2011 (the ."Expiration Date"). (b) The rights represented by this Warrant may be exercised by the Warrantholder of record, in whole, or from time to time in part, by by: (ai) surrender Surrender of this Warrant, accompanied by either the Exercise Form annexed hereto, or if the Warrantholder decides to exercise the Warrant pursuant to the broker-assisted cashless exercise program instituted by the Company, an applicable exercise form provided by the Company (the "Exercise Form") duly executed by the Warrantholder of record and specifying the number of Warrant Shares to be purchased, to the Company at the office of the Company located at ▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇, Suite 1000900, Dallas, Texas 75204 (or such other office or agency of the Company as it may designate by notice to the Warrantholder at the address of such Warrantholder appearing on the books of the Company) during normal business hours on any day (a "Business Day") other than a Saturday, Sunday or a day on which the New York Stock Exchange is authorized to close or on which the Company is otherwise closed for business (a "Nonbusiness Day") on or after 9:00 A.M. New York City time on the applicable Exercise Date but not later than 5:00 P.M., New York City time, P.M. on the Expiration Date (or 5:00 P.M., New York City time, P.M. on the next succeeding Business Day, if the Expiration Date is a Nonbusiness Day), , (bii) delivery Delivery of payment to the Company in cash or by certified or official bank check in New York Clearing House Funds, of the Exercise Price for the number of Warrant Shares specified in the Exercise Form (such payment may be made by the Warrantholder directly or by a designated broker pursuant to the broker-assisted cashless exercise program instituted by the Company, subject to subsection 1.5 herein) and and (ciii) such Such documentation as to the identity and authority of the Warrantholder as the Company may reasonably request. Such Warrant Shares shall be deemed by the Company to be issued to the Warrantholder as the record holder of such Warrant Shares as of the close of business on the date on which this Warrant shall have been surrendered and payment made for the Warrant Shares as aforesaid. Certificates for the Warrant Shares specified in the Exercise Form shall be delivered to the Warrantholder (or designated broker, as the case may be) as promptly as practicable, and in any event within 10 business days, thereafter. The stock certificates so delivered shall be in denominations of at least 1,000 one thousand (1,000) shares each or such other denomination as may be specified by the Warrantholder and agreed upon by the Company, and shall be issued in the name of the Warrantholder or or, if permitted by subsection 1.5 and in accordance with the provisions thereof, such other name as shall be designated in the Exercise Form. If this Warrant shall have been exercised only in part, the Company shall, at the time of delivery of the certificates for the Warrant Shares, deliver to the Warrantholder (or designated broker, as the case may be) a new Warrant evidencing the rights to purchase the remaining Warrant Shares, which new Warrant shall in all other respects be identical with this Warrant. No adjustments or payments shall be made on or in respect of Warrant Shares issuable on the exercise of this Warrant for any cash dividends paid or payable to holders of record of Common Stock prior to the date as of which the Warrantholder shall be deemed to be the record holder of such Warrant Shares. (c) With the consent of the Compensation Committee, and subject at all times to, and only to the extent, if any, permitted under and in accordance with, laws and regulations and other binding obligations or provisions applicable to the Company, the Company may make a loan to the Warrantholder with respect to the exercise of the Warrant, including the payment by the Warrantholder of any or all federal, state and local income or other taxes due in connection with any exercise. The interest on such loan shall be the Company's cost of money plus an additional 0.5% at the time the loan is made and such loan shall be made with recourse against the Warrantholder. The Compensation Committee shall have the full authority to determine any other terms and provisions of such a loan.

Duration and Exercise of Warrant. (a) Subject to Section 1.2, this This Warrant may be exercised to purchase (i) 5033 1/3% of the underlying shares from and after 9:00 A.M. New York City time on January 24March 16, 2002 2001 (the "First Exercise Date") and ); (ii) 5033 1 3% of the underlying shares on January 24March 16, 2002 (the "Second Exercise Date"); and the remaining (iii) 33 1/3% of the underlying shares on March 16, 2003 (the "Second Third Exercise Date") to and including 5:00 P.M. New York City time on March 16, 2010 (the "Expiration Date"). Each of the First Exercise Date, the Second Exercise Date and the Second Third Exercise Date are hereinafter referred to from time to time, as applicable, as the "Exercise Date" and collectively from time to time as the "Exercise Dates"). The Company shall give prompt notice to the Warrantholder of the Exercise Date in accordance with Section 7.6. This Warrant expires at 5:00 P.M., New York City time on January 24, 2011 (the ."Expiration Date"). (b) The rights represented by this Warrant may be exercised by the Warrantholder of record, in whole, or from time to time in part, by by: (ai) surrender Surrender of this Warrant, accompanied by either the Exercise Form annexed hereto, or if the Warrantholder decides to exercise the Warrant pursuant to the broker-assisted cashless exercise program instituted by the Company, an applicable exercise form provided by the Company (the "Exercise Form") duly executed by the Warrantholder of record and specifying the number of Warrant Shares to be purchased, to the Company at the office of the Company located at ▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇, Suite 1000900, Dallas, Texas 75204 (or such other office or agency of the Company as it may designate by notice to the Warrantholder at the address of such Warrantholder appearing on the books of the Company) during normal business hours on any day (a "Business Day") other than a Saturday, Sunday or a day on which the New York Stock Exchange is authorized to close or on which the Company is otherwise closed for business (a "Nonbusiness Day") on or after 9:00 A.M. New York City time on the applicable Exercise Date but not later than 5:00 P.M., New York City time, P.M. on the Expiration Date (or 5:00 P.M., New York City time, P.M. on the next succeeding Business Day, if the Expiration Date is a Nonbusiness Day), , (bii) delivery Delivery of payment to the Company in cash or by certified or official bank check in New York Clearing House Funds, of the Exercise Price for the number of Warrant Shares specified in the Exercise Form (such payment may be made by the Warrantholder directly or by a designated broker pursuant to the broker-assisted cashless exercise program instituted by the Company, subject to subsection 1.5 herein) and and (ciii) such Such documentation as to the identity and authority of the Warrantholder as the Company may reasonably request. Such Warrant Shares shall be deemed by the Company to be issued to the Warrantholder as the record holder of such Warrant Shares as of the close of business on the date on which this Warrant shall have been surrendered and payment made for the Warrant Shares as aforesaid. Certificates for the Warrant Shares specified in the Exercise Form shall be delivered to the Warrantholder (or designated broker, as the case may be) as promptly as practicable, and in any event within 10 business days, thereafter. The stock certificates so delivered shall be in denominations of at least 1,000 one thousand (1,000) shares each or such other denomination as may be specified by the Warrantholder and agreed upon by the Company, and shall be issued in the name of the Warrantholder or or, if permitted by subsection 1.5 and in accordance with the provisions thereof, such other name as shall be designated in the Exercise Form. If this Warrant shall have been exercised only in part, the Company shall, at the time of delivery of the certificates for the Warrant Shares, deliver to the Warrantholder (or designated broker, as the case may be) a new Warrant evidencing the rights to purchase the remaining Warrant Shares, which new Warrant shall in all other respects be identical with this Warrant. No adjustments or payments shall be made on or in respect of Warrant Shares issuable on the exercise of this Warrant for any cash dividends paid or payable to holders of record of Common Stock prior to the date as of which the Warrantholder shall be deemed to be the record holder of such Warrant Shares. (c) With the consent of the Compensation Committee, and subject at all times to, and only to the extent, if any, permitted under and in accordance with, laws and regulations and other binding obligations or provisions applicable to the Company, the Company may make a loan to the Warrantholder with respect to the exercise of the Warrant, including the payment by the Warrantholder of any or all federal, state and local income or other taxes due in connection with any exercise. The interest on such loan shall be the Company's cost of money plus an additional 0.5% at the time the loan is made and such loan shall be made with recourse against the Warrantholder. The Compensation Committee shall have the full authority to determine any other terms and provisions of such a loan.

Duration and Exercise of Warrant. (a) Subject to Section 1.2subsection 1.3, this Warrant may be exercised to purchase (i) 5033 1/3% of the underlying shares from and after 9:00 A.M. New York City time on January 24March 16, 2002 2001 (the "First Exercise Date") and ); (ii) 5033 1/3% of the underlying shares on January 24March 16, 2002 (the "Second Exercise Date"); and the remaining (iii) 33 1/3% of the underlying shares on March 16, 2003 (the "Second Third Exercise Date") to and including 5:00 P.M. New York City time on March 16, 2010 (the "Expiration Date"). Each of the First Exercise Date, the Second Exercise Date and the Second Third Exercise Date are hereinafter referred to from time to time, as applicable, as the "Exercise Date" and collectively from time to time as the "Exercise Dates"). The Company shall give prompt notice to the Warrantholder of the Exercise Date in accordance with Section 7.6. This Warrant expires at 5:00 P.M., New York City time on January 24, 2011 (the ."Expiration Date"). (b) The rights represented by this Warrant may be exercised by the Warrantholder of record, in whole, or from time to time in part, by by: (ai) surrender Surrender of this Warrant, accompanied by either the Exercise Form annexed hereto, or if the Warrantholder decides to exercise the Warrant pursuant to the broker-assisted cashless exercise program instituted by the Company, an applicable exercise form provided by the Company (the "Exercise Form") duly executed by the Warrantholder of record and specifying the number of Warrant Shares to be purchased, to the Company at the office of the Company located at ▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇, Suite 1000900, Dallas, Texas 75204 (or such other office or agency of the Company as it may designate by notice to the Warrantholder at the address of such Warrantholder appearing on the books of the Company) during normal business hours on any day (a "Business Day") other than a Saturday, Sunday or a day on which the New York Stock Exchange is authorized to close or on which the Company is otherwise closed for business (a "Nonbusiness Day") on or after 9:00 A.M. New York City time on the applicable Exercise Date but not later than 5:00 P.M., New York City time, P.M. on the Expiration Date (or 5:00 P.M., New York City time, P.M. on the next succeeding Business Day, if the Expiration Date is a Nonbusiness Day), , (bii) delivery Delivery of payment to the Company in cash or by certified or official bank check in New York Clearing House Funds, of the Exercise Price for the number of Warrant Shares specified in the Exercise Form (such payment may be made by the Warrantholder directly or by a designated broker pursuant to the broker-assisted cashless exercise program instituted by the Company, subject to subsection 1.5 herein) and and (ciii) such Such documentation as to the identity and authority of the Warrantholder as the Company may reasonably request. Such Warrant Shares shall be deemed by the Company to be issued to the Warrantholder as the record holder of such Warrant Shares as of the close of business on the date on which this Warrant shall have been surrendered and payment made for the Warrant Shares as aforesaid. Certificates for the Warrant Shares specified in the Exercise Form shall be delivered to the Warrantholder (or designated broker, as the case may be) as promptly as practicable, and in any event within 10 business days, thereafter. The stock certificates so delivered shall be in denominations of at least 1,000 one thousand (1,000) shares each or such other denomination as may be specified by the Warrantholder and agreed upon by the Company, and shall be issued in the name of the Warrantholder or or, if permitted by subsection 1.5 and in accordance with the provisions thereof, such other name as shall be designated in the Exercise Form. If this Warrant shall have been exercised only in part, the Company shall, at the time of delivery of the certificates for the Warrant Shares, deliver to the Warrantholder (or designated broker, as the case may be) a new Warrant evidencing the rights to purchase the remaining Warrant Shares, which new Warrant shall in all other respects be identical with this Warrant. No adjustments or payments shall be made on or in respect of Warrant Shares issuable on the exercise of this Warrant for any cash dividends paid or payable to holders of record of Common Stock prior to the date as of which the Warrantholder shall be deemed to be the record holder of such Warrant Shares. (c) With In the consent event of the Compensation Committee, and subject at all times to, and only ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇'▇ death prior to the extentExpiration Date, if any, permitted under and in accordance with, laws and regulations and other binding obligations or provisions applicable this Warrant may be exercised to the Company, extent then exercisable by ▇▇. ▇▇▇▇▇▇▇▇▇'▇ legal representative through the Company may make a loan to the Warrantholder with respect to the exercise of the Warrant, including the payment by the Warrantholder of any or all federal, state and local income or other taxes due in connection with any exercise. The interest on such loan shall be the Company's cost of money plus an additional 0.5% at the time the loan is made and such loan shall be made with recourse against the Warrantholder. The Compensation Committee shall have the full authority to determine any other terms and provisions of such a loanExpiration Date.

Duration and Exercise of Warrant. (a) Subject to Section 1.2subsection 1.3, this Warrant may be exercised to purchase (i) 5033 1/3% of the underlying shares from and after 9:00 A.M. New York City time on January 24March 16, 2002 2001 (the "First Exercise Date") and ); (ii) 5033 1/3% of the underlying shares on January 24March 16, 2002 (the "Second Exercise Date"); and the remaining (iii) 33 1/3% of the underlying shares on March 16, 2003 (the "Second Third Exercise Date") to and including 5:00 P.M. New York City time on March 16, 2010 (the "Expiration Date"). Each of the First Exercise Date, the Second Exercise Date and the Second Third Exercise Date are hereinafter referred to from time to time, as applicable, as the "Exercise Date" and collectively from time to time as the "Exercise Dates"). The Company shall give prompt notice to the Warrantholder of the Exercise Date in accordance with Section 7.6. This Warrant expires at 5:00 P.M., New York City time on January 24, 2011 (the ."Expiration Date"). (b) The rights represented by this Warrant may be exercised by the Warrantholder of record, in whole, or from time to time in part, by by: (ai) surrender Surrender of this Warrant, accompanied by either the Exercise Form annexed hereto, or if the Warrantholder decides to exercise the Warrant pursuant to the broker-assisted cashless exercise program instituted by the Company, an applicable exercise form provided by the Company (the "Exercise Form") duly executed by the Warrantholder of record and specifying the number of Warrant Shares to be purchased, to the Company at the office of the Company located at ▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇, Suite 1000900, Dallas, Texas 75204 (or such other office or agency of the Company as it may designate by notice to the Warrantholder at the address of such Warrantholder appearing on the books of the Company) during normal business hours on any day (a "Business Day") other than a Saturday, Sunday or a day on which the New York Stock Exchange is authorized to close or on which the Company is otherwise closed for business (a "Nonbusiness Day") on or after 9:00 A.M. New York City time on the applicable Exercise Date but not later than 5:00 P.M., New York City time, P.M. on the Expiration Date (or 5:00 P.M., New York City time, P.M. on the next succeeding Business Day, if the Expiration Date is a Nonbusiness Day), , (bii) delivery Delivery of payment to the Company in cash or by certified or official bank check in New York Clearing House Funds, of the Exercise Price for the number of Warrant Shares specified in the Exercise Form (such payment may be made by the Warrantholder directly or by a designated broker pursuant to the broker-assisted cashless exercise program instituted by the Company, subject to subsection 1.5 herein) and and (ciii) such Such documentation as to the identity and authority of the Warrantholder as the Company may reasonably request. Such Warrant Shares shall be deemed by the Company to be issued to the Warrantholder as the record holder of such Warrant Shares as of the close of business on the date on which this Warrant shall have been surrendered and payment made for the Warrant Shares as aforesaid. Certificates for the Warrant Shares specified in the Exercise Form shall be delivered to the Warrantholder (or designated broker, as the case may be) as promptly as practicable, and in any event within 10 business days, thereafter. The stock certificates so delivered shall be in denominations of at least 1,000 one thousand (1,000) shares each or such other denomination as may be specified by the Warrantholder and agreed upon by the Company, and shall be issued in the name of the Warrantholder or or, if permitted by subsection 1.5 and in accordance with the provisions thereof, such other name as shall be designated in the Exercise Form. If this Warrant shall have been exercised only in part, the Company shall, at the time of delivery of the certificates for the Warrant Shares, deliver to the Warrantholder (or designated broker, as the case may be) a new Warrant evidencing the rights to purchase the remaining Warrant Shares, which new Warrant shall in all other respects be identical with this Warrant. No adjustments or payments shall be made on or in respect of Warrant Shares issuable on the exercise of this Warrant for any cash dividends paid or payable to holders of record of Common Stock prior to the date as of which the Warrantholder shall be deemed to be the record holder of such Warrant Shares. (c) With In the consent event of the Compensation Committee, and subject at all times to, and only ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇▇'▇ death prior to the extentExpiration Date, if any, permitted under and in accordance with, laws and regulations and other binding obligations or provisions applicable this Warrant may be exercised to the Company, extent then exercisable by ▇▇. ▇▇▇▇▇▇▇▇▇'▇ legal representative through the Company may make a loan to the Warrantholder with respect to the exercise of the Warrant, including the payment by the Warrantholder of any or all federal, state and local income or other taxes due in connection with any exercise. The interest on such loan shall be the Company's cost of money plus an additional 0.5% at the time the loan is made and such loan shall be made with recourse against the Warrantholder. The Compensation Committee shall have the full authority to determine any other terms and provisions of such a loanExpiration Date.

Duration and Exercise of Warrant. (a) Subject to Section 1.2subsection 1.1(c) herein, this Warrant may be exercised to purchase (i) 50100% of the underlying shares from and after 9:00 A.M. New York City time on January 24March 22, 2002 2005 (the "First Exercise Date") and (ii) 50% of the underlying shares on January 24, 2003 (the "Second Exercise Date"). Each of the First Exercise Date ; to and the Second Exercise Date are hereinafter referred to from time to time, as applicable, as the "Exercise Date" and collectively from time to time as the "Exercise Dates"). The Company shall give prompt notice to the Warrantholder of the Exercise Date in accordance with Section 7.6. This Warrant expires at including 5:00 P.M., P.M. New York City time on January 24March 22, 2011 2014 (the "Expiration Date"). (b) The Subject to subsection 1.1 (c) herein, the rights represented by this Warrant may be exercised by the Warrantholder of record, in whole, or from time to time in part, by by: (ai) surrender Surrender of this Warrant, accompanied by either the Exercise Form annexed hereto, or if the Warrantholder decides to exercise the Warrant pursuant to the broker-assisted cashless exercise program instituted by the Company, an applicable exercise form provided by the Company (the "Exercise Form") duly executed by the Warrantholder of record and specifying the number of Warrant Shares to be purchased, to the Company at the office of the Company located at ▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇, Suite 1000▇▇▇▇▇▇▇▇▇▇▇▇, Dallas, Texas 75204 ▇▇▇▇▇▇▇ ▇▇▇▇▇ (or such other office or agency of the Company as it may designate by notice to the Warrantholder at the address of such Warrantholder appearing on the books of the Company) during normal business hours on any day (a "Business Day") other than a Saturday, Sunday or a day on which the New York Stock Exchange is authorized to close or on which the Company is otherwise closed for business (a "Nonbusiness Day") on or after 9:00 A.M. New York City time on the applicable Exercise Date but not later than 5:00 P.M., New York City time, P.M. on the Expiration Date (or 5:00 P.M., New York City time, P.M. on the next succeeding Business Day, if the Expiration Date is a Nonbusiness Day), ; (bii) delivery Delivery of payment to the Company in cash or by certified or official bank check in New York Clearing House Funds, of the Exercise Price for the number of Warrant Shares specified in the Exercise Form (such payment may be made by the Warrantholder directly or by a designated broker pursuant to the broker-assisted cashless exercise program instituted by the Company, subject to subsection 1.5 herein) and and (ciii) such Such documentation as to the identity and authority of the Warrantholder as the Company may reasonably request. Such Warrant Shares shall be deemed by the Company to be issued to the Warrantholder as the record holder of such Warrant Shares as of the close of business on the date on which this Warrant shall have been surrendered and payment made for the Warrant Shares as aforesaid. Certificates for the Warrant Shares specified in the Exercise Form shall be delivered to the Warrantholder (or designated broker, as the case may be) as promptly as practicable, and in any event within 10 business days, thereafter. The stock certificates so delivered shall be in denominations of at least 1,000 one thousand (1,000) shares each or such other denomination as may be specified by the Warrantholder and agreed upon by the Company, and shall be issued in the name of the Warrantholder or or, if permitted by subsection 1.5 herein and in accordance with the provisions thereof, such other name as shall be designated in the Exercise Form. If this Warrant shall have been exercised only in part, the Company shall, at the time of delivery of the certificates for the Warrant Shares, deliver to the Warrantholder (or designated broker, as the case may be) a new Warrant evidencing the rights to purchase the remaining Warrant Shares, which new Warrant shall in all other respects be identical with this Warrant. No adjustments or payments shall be made on or in respect of Warrant Shares issuable on the exercise of this Warrant for any cash dividends paid or payable to holders of record of Common Stock prior to the date as of which the Warrantholder shall be deemed to be the record holder of such Warrant Shares. (c) With Notwithstanding anything to the consent contrary in this Warrant, the Warrantholder hereby irrevocably agrees not to, directly or indirectly (i) sell, offer, contract to sell, sell any option or contract to purchase, purchase any option or contract to sell, grant any option right or warrant to purchase, transfer the economic risk of ownership in, make any short sale, pledge or otherwise dispose of this Warrant or the Warrant Shares, or (ii) enter into any swap or other arrangement that transfers to another, in whole or in part, any of the Compensation Committeeeconomic consequences of ownership of this Warrant or the Warrant Shares, whether any such transaction described in clause (i) or (ii) above is to be settled by delivery of this Warrant or the Warrant Shares, for a period commencing on the date hereof and, (A) with respect to 33 1/3% of the Warrant Shares, ending ▇▇▇▇▇ ▇▇, ▇▇▇▇, (▇) with respect to an additional 33 1/3% of the Warrant Shares, ending March 22, 2006 and subject at all times to, and only to the extent, if any, permitted under and in accordance with, laws and regulations and other binding obligations or provisions applicable to the Company, the Company may make a loan to the Warrantholder (C) with respect to the exercise remaining 33 1/3% of the WarrantWarrant Shares, including the payment by the Warrantholder of any or all federalending March 22, state and local income or other taxes due in connection with any exercise. The interest on such loan shall be the Company's cost of money plus an additional 0.5% at the time the loan is made and such loan shall be made with recourse against the Warrantholder. The Compensation Committee shall have the full authority to determine any other terms and provisions of such a loan2007.

Duration and Exercise of Warrant. (a) Subject to Section 1.2, this This Warrant may be exercised to purchase (i) 5020% of the underlying shares from and after 9:00 A.M. New York City time on January 24February 25, 2002 2001 (the "First Exercise Date") and ); (ii) 5020% of the underlying shares on January 24February 25, 2002 (the "Second Exercise Date"); (iii) 20% of the underlying shares on February 25, 2003 (the "Second Third Exercise Date"); (iv) 20% of the underlying shares on February 25, 2004 (the "Fourth Exercise Date"); and (v) 20% of the underlying shares on February 25, 2005 (the "Fifth Exercise Date") to and including 5:00 P.M. New York City time on February 25, 2010 (the "Expiration Date"). Each of the First Exercise Date, the Second Exercise Date, the Third Exercise Date, the Fourth Exercise Date and the Second Fifth Exercise Date are hereinafter referred to from time to time, as applicable, as the "Exercise Date" and collectively from time to time as the "Exercise DatesDate."). The Company shall give prompt notice to the Warrantholder of the Exercise Date in accordance with Section 7.6. This Warrant expires at 5:00 P.M., New York City time on January 24, 2011 (the "Expiration Date"). (b) The rights represented by this Warrant may be exercised by the Warrantholder of record, in whole, or from time to time in part, by by: (ai) surrender Surrender of this Warrant, accompanied by either the Exercise Form annexed hereto, or if the Warrantholder decides to exercise the Warrant pursuant to the broker-assisted cashless exercise program instituted by the Company, an applicable exercise form provided by the Company (the "Exercise Form") duly executed by the Warrantholder of record and specifying the number of Warrant Shares to be purchased, to the Company at the office of the Company located at ▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇Avenue, Suite 1000900, Dallas, Texas 75204 (or such other office or agency of the Company as it may designate by notice to the Warrantholder at the address of such Warrantholder appearing on the books of the Company) during normal business hours on any day (a "Business Day") other than a Saturday, Sunday or a day on which the New York Stock Exchange is authorized to close or on which the Company is otherwise closed for business (a "Nonbusiness Day") on or after 9:00 A.M. New York City time on the applicable Exercise Date but not later than 5:00 P.M., New York City time, P.M. on the Expiration Date (or 5:00 P.M., New York City time, P.M. on the next succeeding Business Day, if the Expiration Date is a Nonbusiness Day), , (bii) delivery Delivery of payment to the Company in cash or by certified or official bank check in New York Clearing House Funds, of the Exercise Price for the number of Warrant Shares specified in the Exercise Form (such payment may be made by the Warrantholder directly or by a designated broker pursuant to the broker-assisted cashless exercise program instituted by the Company, subject to subsection 1.5 herein) and and (ciii) such Such documentation as to the identity and authority of the Warrantholder as the Company may reasonably request. Such Warrant Shares shall be deemed by the Company to be issued to the Warrantholder as the record holder of such Warrant Shares as of the close of business on the date on which this Warrant shall have been surrendered and payment made for the Warrant Shares as aforesaid. Certificates for the Warrant Shares specified in the Exercise Form shall be delivered to the Warrantholder (or designated broker, as the case may be) as promptly as practicable, and in any event within 10 business days, thereafter. The stock certificates so delivered shall be in denominations of at least 1,000 one thousand (1,000) shares each or such other denomination as may be specified by the Warrantholder and agreed upon by the Company, and shall be issued in the name of the Warrantholder or or, if permitted by subsection 1.5 and in accordance with the provisions thereof, such other name as shall be designated in the Exercise Form. If this Warrant shall have been exercised only in part, the Company shall, at the time of delivery of the certificates for the Warrant Shares, deliver to the Warrantholder (or designated broker, as the case may be) a new Warrant evidencing the rights to purchase the remaining Warrant Shares, which new Warrant shall in all other respects be identical with this Warrant. No adjustments or payments shall be made on or in respect of Warrant Shares issuable on the exercise of this Warrant for any cash dividends paid or payable to holders of record of Common Stock prior to the date as of which the Warrantholder shall be deemed to be the record holder of such Warrant Shares. (c) With the consent of the Compensation Committee, and subject at all times to, and only to the extent, if any, permitted under and in accordance with, laws and regulations and other binding obligations or provisions applicable to the Company, the Company may make a loan to the Warrantholder with respect to the exercise of the Warrant, including the payment by the Warrantholder of any or all federal, state and local income or other taxes due in connection with any exercise. The interest on such loan shall be the Company's cost of money plus an additional 0.5% at the time the loan is made and such loan shall be made with recourse against the Warrantholder. The Compensation Committee shall have the full authority to determine any other terms and provisions of such a loan.

Duration and Exercise of Warrant. (a) Subject to Section 1.2, this This Warrant may be exercised to purchase (i) 5020% of the underlying shares from and after 9:00 A.M. New York City time on January 24March 16, 2002 2001 (the "First Exercise Date") and ); (ii) 5020% of the underlying shares on January 24March 16, 2002 (the "Second Exercise Date"); (iii) 20% of the underlying shares on March 16, 2003 (the "Second Third Exercise Date"); (iv) 20% of the underlying shares on March 16, 2004 (the "Fourth Exercise Date"); and (v) 20% of the underlying shares on March 16, 2005 (the "Fifth Exercise Date") to and including 5:00 P.M. New York City time on March 16, 2010 (the "Expiration Date"). Each of the First Exercise Date, the Second Exercise Date, the Third Exercise Date, the Fourth Exercise Date and the Second Fifth Exercise Date are hereinafter referred to from time to time, as applicable, as the "Exercise Date" and collectively from time to time as the "Exercise DatesDate."). The Company shall give prompt notice to the Warrantholder of the Exercise Date in accordance with Section 7.6. This Warrant expires at 5:00 P.M., New York City time on January 24, 2011 (the "Expiration Date"). (b) The rights represented by this Warrant may be exercised by the Warrantholder of record, in whole, or from time to time in part, by by: (ai) surrender Surrender of this Warrant, accompanied by either the Exercise Form annexed hereto, or if the Warrantholder decides to exercise the Warrant pursuant to the broker-assisted cashless exercise program instituted by the Company, an applicable exercise form provided by the Company (the "Exercise Form") duly executed by the Warrantholder of record and specifying the number of Warrant Shares to be purchased, to the Company at the office of the Company located at ▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇, Suite 1000900, Dallas, Texas 75204 (or such other office or agency of the Company as it may designate by notice to the Warrantholder at the address of such Warrantholder appearing on the books of the Company) during normal business hours on any day (a "Business Day") other than a Saturday, Sunday or a day on which the New York Stock Exchange is authorized to close or on which the Company is otherwise closed for business (a "Nonbusiness Day") on or after 9:00 A.M. New York City time on the applicable Exercise Date but not later than 5:00 P.M., New York City time, P.M. on the Expiration Date (or 5:00 P.M., New York City time, P.M. on the next succeeding Business Day, if the Expiration Date is a Nonbusiness Day), , (bii) delivery Delivery of payment to the Company in cash or by certified or official bank check in New York Clearing House Funds, of the Exercise Price for the number of Warrant Shares specified in the Exercise Form (such payment may be made by the Warrantholder directly or by a designated broker pursuant to the broker-assisted cashless exercise program instituted by the Company, subject to subsection 1.5 herein) and and (ciii) such Such documentation as to the identity and authority of the Warrantholder as the Company may reasonably request. Such Warrant Shares shall be deemed by the Company to be issued to the Warrantholder as the record holder of such Warrant Shares as of the close of business on the date on which this Warrant shall have been surrendered and payment made for the Warrant Shares as aforesaid. Certificates for the Warrant Shares specified in the Exercise Form shall be delivered to the Warrantholder (or designated broker, as the case may be) as promptly as practicable, and in any event within 10 business days, thereafter. The stock certificates so delivered shall be in denominations of at least 1,000 one thousand (1,000) shares each or such other denomination as may be specified by the Warrantholder and agreed upon by the Company, and shall be issued in the name of the Warrantholder or or, if permitted by subsection 1.5 and in accordance with the provisions thereof, such other name as shall be designated in the Exercise Form. If this Warrant shall have been exercised only in part, the Company shall, at the time of delivery of the certificates for the Warrant Shares, deliver to the Warrantholder (or designated broker, as the case may be) a new Warrant evidencing the rights to purchase the remaining Warrant Shares, which new Warrant shall in all other respects be identical with this Warrant. No adjustments or payments shall be made on or in respect of Warrant Shares issuable on the exercise of this Warrant for any cash dividends paid or payable to holders of record of Common Stock prior to the date as of which the Warrantholder shall be deemed to be the record holder of such Warrant Shares. (c) With the consent of the Compensation Committee, and subject at all times to, and only to the extent, if any, permitted under and in accordance with, laws and regulations and other binding obligations or provisions applicable to the Company, the Company may make a loan to the Warrantholder with respect to the exercise of the Warrant, including the payment by the Warrantholder of any or all federal, state and local income or other taxes due in connection with any exercise. The interest on such loan shall be the Company's cost of money plus an additional 0.5% at the time the loan is made and such loan shall be made with recourse against the Warrantholder. The Compensation Committee shall have the full authority to determine any other terms and provisions of such a loan.