Common use of Optional Modifications Clause in Contracts

Optional Modifications. Lessee at any time may or may permit a Sublessee to, in its discretion and at its own or such Sublessee's cost and expense, modify, alter or improve any Unit in a manner which is not required by Section 9.1 (a "Modification"); provided that no Modification (i) shall diminish the fair market value, residual value, utility or remaining economic useful life of such Unit below the fair market value, residual value, utility or remaining economic useful life thereof immediately prior to such Modification, in more than a de minimis respect, assuming such Unit was then at least in the condition required to be maintained by the terms of this Lease or (ii) cause such Unit to become "limited use property" within the meaning of Revenue Procedure 2001-28 or Revenue Procedure 2001-29. Title to any Non-Severable Modification shall be immediately vested in Lessor. Title to any Severable Modification (other than Required Modifications) shall remain with Lessee or the Sublessee as applicable. If Lessee shall at its cost cause such Severable Modifications (other than Required Modifications) to be made to any Unit, Lessor shall have the right, upon 90 days prior written notice in the case of the return of such Unit pursuant to Section 6.1, to purchase any such Severable Modifications (other than Severable Modifications consisting of proprietary or communications equipment) title to which is held by Lessee at their then Fair Market Sales Value (taking into account their actual condition). If Lessor does not so elect to purchase such Severable Modifications, Lessee may remove such Severable Modifications at Lessee's cost and expense, and if requested (which request shall be made by not less than 90 days prior written notice in the case of a return other than pursuant to Section 15.6) by Lessor will so remove such Severable Modifications at Lessee's cost and expense, and Lessee shall, at its expense, repair any damage resulting from the removal of any such Severable Modifications in a manner consistent with Section 8.1; provided that such removal shall not (i) diminish the fair market value, residual value, utility or remaining economic useful life of the Unit to which such Severable Modifications relate below the fair market value, residual value, utility or remaining economic useful life thereof immediately prior to the addition of such Severable Modifications, in more than a de minimis respect, assuming such Unit was then at least in the condition required to be maintained by the terms of this Lease or (ii) cause such Unit to become "limited use property" within the meaning of Revenue Procedure 2001-28 or Revenue Procedure 2001-29. If Lessee has not removed any Severable Modification prior to the return of the related Unit as provided herein, title to such Severable Modification shall pass to Lessor as of the date of such return.

Optional Modifications. Lessee at any time may or may permit a Sublessee to, in its discretion and at its own or such Sublessee's cost and expense, modify, alter or improve any Unit in a manner which is not required by Section 9.1 (a "Modification"); provided that no Modification (i) shall diminish the fair market value, utility, capacity, residual value, utility value or remaining economic useful life of such Unit below the fair market value, utility, capacity, residual value, utility value or remaining economic useful life thereof immediately prior to such Modification, in more than a de minimis respect, assuming such Unit was then at least in the condition required to be maintained by the terms of this Lease or (ii) cause such Unit to become "limited use property" within the meaning of Revenue Procedure 2001-28 or Revenue Procedure 2001-29Lease. Title to any Non-Severable Modification shall be immediately vested in Lessor. Title to any Severable Modification (other than Required Modifications) shall remain with Lessee or the Sublessee as applicable. If Lessee shall at its cost cause such Severable Modifications (other than Required Modifications) to be made to any Unit, Lessor shall have the right, upon 90 days prior written notice in the case of the return of such Unit pursuant to Section 6.1, to purchase any such Severable Modifications (other than Severable Modifications consisting of proprietary or communications equipment) title to which is held by Lessee at their then Fair Market Sales Value (taking into account their actual condition). If Lessor does not so elect to purchase such Severable Modifications, Lessee may remove such Severable Modifications at Lessee's cost and expense, and if requested (which request shall be made by not less than 90 days prior written notice in the case of a return other than pursuant to Section 15.6) by Lessor will so remove such Severable Modifications at Lessee's cost and expense, and Lessee shall, at its expense, repair any damage resulting from the removal of any such Severable Modifications in a manner consistent with Section 8.1; provided that such removal shall not (i) diminish the fair market value, residual value, utility or remaining economic useful life of the Unit to which such Severable Modifications relate below the fair market value, residual value, utility or remaining economic useful life thereof immediately prior to the addition of such Severable Modifications, in more than a de minimis respect, assuming such Unit was then at least in the condition required to be maintained by the terms of this Lease or (ii) cause such Unit to become "limited use property" within the meaning of Revenue Procedure 2001-28 or Revenue Procedure 2001-298. 1. If Lessee has not removed any Severable Modification prior to the return of the related Unit as Lease Agreement (TRLI 2001-1B) provided herein, title to such Severable Modification shall pass to Lessor as of the date of such return.

Optional Modifications. Lessee at any time may or may permit a Sublessee to, in its discretion and at its own or such Sublessee's cost and expense, modify, alter or improve any Unit in a manner which is not required by Section 9.1 (a "Modification"); provided that no Modification (i) shall diminish the fair market value, utility, capacity, residual value, utility value or remaining economic useful life of such Unit below the fair market value, utility, capacity, residual value, utility value or remaining economic useful life thereof immediately prior to such Modification, in more than a de minimis respect, assuming such Unit was then at least in the condition required to be maintained by the terms of this Lease or (ii) cause such Unit to become "limited use property" within the meaning of Revenue Procedure 2001-28 or Revenue Procedure 2001-29Lease. Title to any Non-Severable Modification shall be immediately vested in Lessor. Title to any Severable Modification (other than Required Modifications) shall remain with Lessee or the Sublessee as applicable. If Lessee shall at its cost cause such Severable Modifications (other than Required Modifications) to be made to any Unit, Lessor shall have the right, upon 90 days prior written notice in the case of the return of such Unit pursuant to Section 6.1, to purchase any such Severable Modifications (other than Severable Modifications consisting of proprietary or communications equipment) title to which is held by Lessee at their then Fair Market Sales Value (taking into account their actual condition). If Lessor does not so elect to purchase such Severable Modifications, Lessee may remove such Severable Modifications at Lessee's cost and expense, and if requested (which request shall be made by not less than 90 days prior written notice in the case of a return other than pursuant to Section 15.6) by Lessor will so remove such Severable Modifications at Lessee's cost and expense, and Lessee shall, at its expense, repair any damage resulting from the removal of any such Severable Modifications in a manner consistent with Section Section 8.1; provided that such removal shall not (i) diminish the fair market value, residual value, utility or remaining economic useful life of the Unit to which such Severable Modifications relate below the fair market value, residual value, utility or remaining economic useful life thereof immediately prior to the addition of such Severable Modifications, in more than a de minimis respect, assuming such Unit was then at least in the condition required to be maintained by the terms of this Lease or (ii) cause such Unit to become "limited use property" within the meaning of Revenue Procedure 2001-28 or Revenue Procedure 2001-29. If Lessee has not removed any Severable Modification prior to the return of the related Unit as provided herein, title to such Severable Modification shall pass to Lessor as of the date of such return.

Optional Modifications. Lessee at any time may or may permit a Sublessee to, in its discretion and at its own or such Sublessee's cost and expense, modify, alter or improve any Unit in a manner which is not required by Section 9.1 (a "Modification"); provided that no Modification (i) shall diminish the fair market value, utility, capacity, residual value, utility value or remaining economic useful life of such Unit below the fair market value, utility, capacity, residual value, utility value or remaining economic useful life thereof immediately prior to such Modification, in more than a de minimis respect, assuming such Unit was then at least in the condition required to be maintained by the terms of this Lease or (ii) cause such Unit to become "limited use property" within the meaning of Revenue Procedure 2001-28 or Revenue Procedure 2001-29Lease. Title to any Non-Severable Modification shall be immediately vested in Lessor. Title to any Severable Modification (other than Required Modifications) shall remain with Lessee or the Sublessee as applicable. If Lessee shall at its cost cause such Severable Modifications (other than Required Modifications) to be made to any Unit, Lessor shall have the right, upon 90 days prior written notice in the case of the return of such Unit pursuant to Section 6.1, to purchase any such Severable Modifications (other than Severable Modifications consisting of proprietary or communications equipment) title to which is held by Lessee at their then Fair Market Sales Value (taking into account their actual condition). If Lessor does not so elect to purchase such Severable Modifications, Lessee may remove such Severable Modifications at Lessee's cost and expense, and if requested (which request shall be made by not less than 90 days prior written notice in the case of a return other than pursuant to Section 15.6) by Lessor will so remove such Severable Modifications at Lessee's cost and expense, and Lessee shall, at its expense, repair any damage resulting from the removal of any such Severable Modifications in a manner consistent with Section 8.1; provided that such removal shall not (i) diminish the fair market value, residual value, utility or remaining economic useful life of the Unit to which such Severable Modifications relate below the fair market value, residual value, utility or remaining economic useful life thereof immediately prior to the addition of such Severable Modifications, in more than a de minimis respect, assuming such Unit was then at least in the condition required to be maintained by the terms of this Lease or (ii) cause such Unit to become "limited use property" within the meaning of Revenue Procedure 2001-28 or Revenue Procedure 2001-298. 1. If Lessee has not removed any Severable Modification prior to the return of the related Unit as provided herein, title to such Severable Modification shall pass to Lessor as of the date of such return.

Optional Modifications. Lessee at any time may or may permit a Sublessee to, in its discretion and at its own or such Sublessee's cost and expense, modify, alter or improve any Unit in a manner which is not required by Section 9.1 (a "Modification"); provided that no Modification (i) shall diminish the fair market value, utility, capacity, residual value, utility value or remaining economic useful life of such Unit below the fair market value, utility, capacity, residual value, utility value or remaining economic useful life thereof immediately prior to such Modification, in more than a de minimis respect, assuming such Unit was then at least in the condition required to be maintained by the terms of this Lease or (ii) cause such Unit to become "limited use property" within the meaning of Revenue Procedure 2001-28 or Revenue Procedure 2001-29Lease. Title to any Non-Severable Modification shall be immediately vested in Lessor. Title to any Severable Modification (other than Required Modifications) shall remain with Lessee or the Sublessee as applicable. If Lessee shall at its cost cause such Severable Modifications (other than Required Modifications) to be made to any Unit, Lessor shall have the right, upon 90 days prior written notice in the case of the return of such Unit pursuant to Section 6.1, to purchase any such Severable Modifications (other than Severable Modifications consisting of proprietary or communications equipment) title to which is held by Lessee at their then Fair Market Sales Value (taking into account their actual condition). If Lessor does not so elect to purchase such Severable Modifications, Lessee may remove such Severable Modifications at Lessee's cost and expense, and if requested (which request shall be made by not less than 90 days prior written notice in the case of a return other than pursuant to Section 15.6) by Lessor will so remove such Severable Modifications at Lessee's cost and expense, and Lessee shall, at its expense, repair any damage resulting from the removal of any such Severable Modifications in a manner consistent with Section 8.1; provided that such removal shall not (i) diminish the fair market value, residual value, utility or remaining economic useful life of the Unit to which such Severable Modifications relate below the fair market value, residual value, utility or remaining economic useful life thereof immediately prior to the addition of such Severable Modifications, in more than a de minimis respect, assuming such Unit was then at least in the condition required to be maintained by the terms of this Lease or (ii) cause such Unit to become "limited use property" within the meaning of Revenue Procedure 2001-28 or Revenue Procedure 2001-29. If Lessee has not removed any Severable Modification prior to the return of the related Unit as provided herein, title to such Severable Modification shall pass to Lessor as of the date of such return.

Optional Modifications. Lessee at any time may or may permit a Sublessee to, in its ---------------------- discretion and at its own or such Sublessee's cost and expense, expense modify, alter or improve any Unit in a manner which is not required by Section 9.1 (a "Modification"); provided that ------------ no Modification (i) shall diminish the fair market value, residual valueutility, utility capacity, or remaining economic useful life of such Unit below the fair market value, residual valueutility, utility capacity, or remaining economic useful life thereof immediately prior to such Modification, in more than a any non de minimis minimus respect, assuming such Unit was then at least in the condition required to be maintained by the terms of this Lease or (ii) cause Lease, provided -------- that Lessee shall not discriminate against such Unit to become "limited use property" within in making such modification, alteration or improvement as compared with other equipment of the meaning of Revenue Procedure 2001-28 same type as the Unit and which are owned or Revenue Procedure 2001-29leased by the Lessee. Title to any Non-Severable Modification shall be immediately vested in Lessor. Title to any Severable Modification (other than Required Modifications) shall remain with Lessee or the Sublessee as applicableLessee. If Lessee shall at its cost cause such Severable Modifications (other than Required Modifications) to be made to any Unit, Lessor shall have the right, upon 90 days prior written notice in the case of a return other than pursuant to Section 15.6, prior to the return of such Unit pursuant to Section 6.1Lessor hereunder, to purchase any such Severable Modifications (other than Severable Modifications consisting of proprietary or communications equipment) title to which is held by Lessee at their then Fair Market Sales Value (taking into account their actual condition). If Lessor does not so elect to purchase such Severable Modifications, Lessee may remove such Severable Modifications at Lessee's cost and expense, and if requested (which request shall be made by not less than 90 days prior written notice in the case of a return other than pursuant to Section 15.6) by Lessor will so remove such Severable Modifications at Lessee's cost and expense, and Lessee shall, at its expense, repair any damage resulting from the removal of any such Severable Modifications in a manner consistent with Section 8.1; provided that such removal shall not (i) diminish the fair market value, residual value, utility or remaining economic useful life of the Unit to which such Severable Modifications relate below the fair market value, residual value, utility or remaining economic useful life thereof immediately prior to the addition of such Severable Modifications, in more than a de minimis respect, assuming such Unit was then at least in the condition required to be maintained by the terms of this Lease or (ii) cause such Unit to become "limited use property" within the meaning of Revenue Procedure 2001-28 or Revenue Procedure 2001-29. If Lessee has not removed any Severable Modification prior to the return of the related Unit as provided herein, title to such Severable Modification shall pass to Lessor as of the date of such return.

Optional Modifications. The Lessee at any time may or may permit a Sublessee to, in its discretion and at its own or such Sublessee's cost and expense, modify, alter alter, improve, replace or improve substitute any Unit in (an "Optional Modification"; and each of an Optional Modification and a manner which Required Modification is not required by Section 9.1 (a "Modification"); provided that no Optional Modification shall (i) shall diminish the fair market value, residual valueutility, utility or condition, remaining economic useful life life, or estimated residual value of such Unit below the fair market value, residual valueutility, utility or condition, remaining economic useful life life, or estimated residual value thereof immediately prior to such Modification, in more than a de minimis respect, assuming such Unit was then at least in the condition required to be maintained by the terms of this Lease or Lease, (ii) cause such any Unit to become "limited use property" within the meaning of Revenue Procedure 200176-28 30, (iii) otherwise result, in the opinion of Owner Participant's tax counsel, in adverse tax consequences to the Owner Participant or Revenue Procedure 2001-29the Lessor which are not subject to indemnification under the Tax Indemnity Agreement, or (iv) alter the essential function of such Unit from that for which it was designed and intended. Title to any Non-Severable Modification which is an Optional Modification shall be immediately vested in the Lessor. Title to any Severable Modification (other than which is not a Required Modifications) shall Modification shall, as between the Lessor and the Lessee, remain with the Lessee (subject to the rights, if any, of Bayer to such Severable Modification arising under the terms of the Facility Documents). During the Lease Term or at the Sublessee return of such Unit, and so long as applicableno Lease Default or Lease Event of Default shall have occurred and be continuing, the Lessee may remove and replace any Severable Modification which is not a Required Modification; provided, however, that the Lessee may remove in the ordinary course of the operation of the Units precious metal catalysts, commonly referred to as gauze changeouts (each, a "Gauze Changeout"), provided that each Gauze Changeout which is removed is simultaneously replaced with an operationally equivalent Gauze Changeout of equal or greater utility. If Lessee shall Upon the return of a Unit, if the Lessee, at its cost cost, shall cause such any Severable Modifications (other than which are not Required Modifications) Modifications to be made to any such Unit, and such Severable Modifications theretofore made have not been removed, the Lessor shall have the right, upon 90 days prior written notice in the case of the return of such Unit pursuant to Section 6.1, right to purchase any such Severable Modifications (other than Severable Modifications Modification consisting of proprietary or communications equipmentequipment of the Lessee) title to which is held by Lessee at their then Fair Market Sales Value (taking into account their actual condition)fair market value. If the Lessor does not so elect to purchase such Severable Modifications, Lessee may remove Modifications or such Severable Modifications Modification consists of proprietary equipment of the Lessee and has not been removed, it shall have the right to cause, at the Lessee's cost and expense, and if requested (which request shall be made by not less than 90 days prior written notice in the case of a return other than pursuant to Section 15.6) by Lessor will so remove such Severable Modifications at Lessee's cost and expense, and Lessee shall, at its expense, repair any damage resulting from the removal of any such Severable Modifications in a manner consistent with Section 8.1; provided that such removal shall not (i) diminish the fair market value, residual value, utility or remaining economic useful life of the Unit to which such Severable Modifications relate below the fair market value, residual value, utility or remaining economic useful life thereof immediately prior to the addition of such Severable Modifications, in more than a de minimis respect, assuming such Unit was then at least in the condition required to be maintained by the terms of this Lease or (ii) cause such Unit to become "limited use property" within the meaning of Revenue Procedure 2001-28 or Revenue Procedure 2001-29. If Lessee has not removed any Severable Modification prior to the upon return of the related Unit as provided herein, title to such Severable Modification shall pass to Lessor as of the date of such returnUnit.

Optional Modifications. Lessee at any time may or may permit a Sublessee to, in its ---------------------- discretion and at its own or such Sublessee's cost and expense, expense modify, alter or improve any Unit in a manner which is not required by Section 9.1 (a "Modification"); provided that no Modification (i) shall diminish the fair market value, utility, capacity, residual value, utility value or remaining economic useful life of such Unit below the fair market value, utility, capacity, residual value, utility value or remaining economic useful life thereof immediately prior to such Modification, in more than a de minimis respect, assuming such Unit was then at least in the condition required to be maintained by the terms of this Lease or (ii) cause such Unit to become "limited use property" within the meaning of Revenue Procedure 2001-28 or Revenue Procedure 2001-29Lease. Title to any Non-Severable Modification shall be immediately vested in Lessor. Title to any Severable Modification (other than Required Modifications) shall remain with Lessee or the Sublessee as applicableLessee. If Lessee shall at its cost cause such Severable Modifications (other than Required Modifications) to be made to any Unit, Lessor shall have the right, upon 90 days prior written notice in the case of the return of such Unit pursuant to Section 6.1, to purchase any such Severable Modifications (other than Severable Modifications consisting of proprietary or communications equipment) title to which is held by Lessee at their then Fair Market Sales Value (taking into account their actual condition). If Lessor does not so elect to purchase such Severable Modifications, Lessee may remove such Severable Modifications at Lessee's cost and expense, and if requested (which request shall be made by not less than 90 days prior written notice in the case of a return other than pursuant to Section 15.6) by Lessor will so remove such Severable Modifications at Lessee's cost and expense, and Lessee shall, at its expense, repair any damage resulting from the removal of any such Severable Modifications in a manner consistent with Section 8.1; provided that such removal shall not (i) diminish the fair market value, residual value, utility or remaining economic useful life of the Unit to which such Severable Modifications relate below the fair market value, residual value, utility or remaining economic useful life thereof immediately prior to the addition of such Severable Modifications, in more than a de minimis respect, assuming such Unit was then at least in the condition required to be maintained by the terms of this Lease or (ii) cause such Unit to become "limited use property" within the meaning of Revenue Procedure 2001-28 or Revenue Procedure 2001-298. 1. If Lessee has not removed any Severable Modification prior to the return of the related Unit as provided herein, title to such Severable Modification shall pass to Lessor as of the date of such return.

Optional Modifications. Lessee at any time may or may permit a Sublessee to, in its discretion and at its own or such Sublessee's cost and expense, modify, alter or improve any Unit in a manner which is not required by Section 9.1 (a "Modification"); provided that no Modification (i) shall diminish the fair market value, residual value, utility or remaining economic useful life of such Unit below the fair market value, residual value, utility or remaining economic useful life thereof immediately prior to such Modification, in more than a de minimis respect, assuming such Unit was then at least in the condition required to be maintained by the terms of this Lease or (ii) cause such Unit to become "limited use property" within the meaning of Revenue Procedure 2001-28 or Revenue Procedure 2001-29. Title to any Non-Severable Modification shall be immediately vested in Lessor. Title to any Severable Modification (other than Required Modifications) shall remain with Lessee or the Sublessee as applicable. If Lessee shall at its cost cause such Severable Modifications (other than Required Modifications) to be made to any Unit, Lessor shall have the right, upon 90 days prior written notice in the case of the return of such Unit pursuant to Section 6.1, to purchase any such Severable Modifications (other than Severable Modifications consisting of proprietary or communications equipment) title to which is held by Lessee at their then Fair Market Sales Value (taking into account their actual condition). If Lessor does not so elect to purchase such Severable Modifications, Lessee may remove such Severable Modifications at Lessee's cost and expense, and if requested (which request shall be made by not less than 90 days prior written notice in the case of a return other than pursuant to Section 15.6) by Lessor will so remove such Severable Modifications at Lessee's cost and expense, and Lessee shall, at its expense, repair any damage resulting from the removal of any such Severable Modifications in a manner consistent with Section 8.1; provided that such removal shall not (i) diminish the fair market value, residual value, utility or remaining economic useful life of the Unit to which such Severable Modifications relate below the fair market value, residual value, utility or remaining economic useful life thereof immediately prior to the addition of such Severable Modifications, in more than a de minimis respect, assuming such Unit was then at least in the condition required to be maintained by the terms of this Lease or (ii) cause such Unit to become "limited use property" within the meaning of Revenue Procedure 2001-28 or Revenue Procedure 2001-29. If Lessee has not removed any Severable Modification prior to the return of the related Unit as provided herein, title to such Severable Modification shall pass to Lessor as of the date of such return.or

Optional Modifications. Lessee at any time may or may permit a Sublessee to, in its discretion and at its own or such Sublessee's cost and expense, expense modify, alter or improve any Unit in a manner which is not required by Section 9.1 (a "Modification"); provided that no Modification (i) shall diminish the fair market value, residual valueutility, utility capacity, or remaining economic useful life of such Unit below the fair market value, residual valueutility, utility capacity, or remaining economic useful life thereof immediately prior to such Modification, in more than a any non de minimis minimus respect, assuming such Unit was then at least in the condition required to be maintained by the terms of this Lease or (ii) cause Lease, provided that Lessee shall not discriminate against such Unit to become "limited use property" within in making such modification, alteration or improvement as compared with other equipment of the meaning of Revenue Procedure 2001-28 same type as the Unit and which are owned or Revenue Procedure 2001-29leased by the Lessee. Title to any Non-Severable Modification shall be immediately vested in Lessor. Title to any Severable Modification (other than Required Modifications) shall remain with Lessee or the Sublessee as applicableLessee. If Lessee shall at its cost cause such Severable Modifications (other than Required Modifications) to be made to any Unit, Lessor shall have the right, upon 90 days prior written notice in the case of a return other than pursuant to Section 15.6, prior to the return of such Unit pursuant to Section 6.1Lessor hereunder, to purchase any such Severable Modifications (other than Severable Modifications consisting of proprietary or communications equipment) title to which is held by Lessee at their then Fair Market Sales Value (taking into account their actual condition). If Lessor does not so elect to purchase such Severable Modifications, Lessee may remove such Severable Modifications at Lessee's cost and expense, and if requested (which request shall be made by not less than 90 days prior written notice in the case of a return other than pursuant to Section 15.6) by Lessor will so remove such Severable Modifications at Lessee's cost and expense, and Lessee shall, at its expense, repair any damage resulting from the removal of any such Severable Modifications in a manner consistent with Section 8.1; provided that such removal shall not (i) diminish the fair market value, residual value, utility or remaining economic useful life of the Unit to which such Severable Modifications relate below the fair market value, residual value, utility or remaining economic useful life thereof immediately prior to the addition of such Severable Modifications, in more than a de minimis respect, assuming such Unit was then at least in the condition required to be maintained by the terms of this Lease or (ii) cause such Unit to become "limited use property" within the meaning of Revenue Procedure 2001-28 or Revenue Procedure 2001-29. If Lessee has not removed any Severable Modification prior to the return of the related Unit as provided herein, title to such Severable Modification shall pass to Lessor as of the date of such return.

Optional Modifications. Lessee at any time may or may permit a Sublessee to, in its ---------------------- discretion and at its own or such Sublessee's cost and expense, expense modify, alter or improve any Unit in a manner which is not required by Section 9.1 (a "Modification"); provided that no Modification (i) shall diminish the fair market value, residual valueutility, utility capacity, or remaining economic useful life of such Unit below the fair market value, utility, capacity, residual value, utility value or remaining economic useful life thereof immediately prior to such Modification, in more than a any non de minimis respect, assuming such Unit was then at least in the condition required to be maintained by the terms of this Lease or (ii) cause such Unit to become "limited use property" within the meaning of Revenue Procedure 2001-28 or Revenue Procedure 2001-29Limited Use Property. Title to any Non-Non- Severable Modification shall be immediately vested in Lessor. Title to any Severable Modification (other than Required Modifications) shall remain with Lessee or the Sublessee as applicableLessee. If Lessee shall at its cost cause such Severable Modifications (other than Required Modifications) to be made to any Unit, Lessor shall have the right, upon 90 days prior written notice in the case of the a return of such Unit other than pursuant to Section 6.115.6, to purchase any such Severable Modifications (other than Severable Modifications consisting of proprietary or communications equipment) title to which is held by Lessee at their then Fair Market Sales Value (taking into account their actual condition). If Lessor does not so elect to purchase such Severable Modifications, Lessee may remove such Severable Modifications at Lessee's cost and expense, and if requested (which request shall be made by not less than 90 days prior written notice in the case of a return other than pursuant to Section 15.6) by Lessor will so remove such Severable Modifications at Lessee's cost and expense, and Lessee shall, at its expense, repair any damage resulting from the removal of any such Severable Modifications in a manner consistent with Section 8.1; provided that such removal shall not (i) diminish the fair market value, residual value, utility or remaining economic useful life of the Unit to which such Severable Modifications relate below the fair market value, residual value, utility or remaining economic useful life thereof immediately prior to the addition of such Severable Modifications, in more than a de minimis respect, assuming such Unit was then at least in the condition required to be maintained by the terms of this Lease or (ii) cause such Unit to become "limited use property" within the meaning of Revenue Procedure 2001-28 or Revenue Procedure 2001-298. 1. If Lessee has not removed any Severable Modification prior to the return of the related Unit as provided herein, title to such Severable Modification shall pass to Lessor as of the date of such return.

Optional Modifications. Lessee at any time may or may permit a Sublessee to, in its discretion and at its own or such Sublessee's cost and expense, modify, alter or improve any Unit in a manner which is not required by Section 9.1 (a "Modification"); provided that no Modification (i) shall diminish the fair market value, utility, capacity, residual value, utility value or remaining economic useful life of such Unit below the fair market value, utility, capacity, residual value, utility value or remaining economic useful life thereof immediately prior to such Modification, in more than a de minimis respect, assuming such Unit was then at least in the condition required to be maintained by the terms of this Lease or (ii) cause such Unit to become "limited use property" within the meaning of Revenue Procedure 2001-28 or Revenue Procedure 2001-29Lease. Title to any Non-Severable Modification shall be immediately vested in Lessor. Title to any Severable Modification (other than Required Modifications) shall remain with Lessee or the Sublessee as applicable. If Lessee shall at its cost cause such Severable Modifications (other than Required Modifications) to be made to any Unit, Lessor shall have the right, upon 90 days prior written notice in the case of the return of such Unit pursuant to Section 6.1, to purchase any such Severable Modifications (other than Severable Modifications consisting of proprietary or communications equipment) title to which is held by Lessee at their then Fair Market Sales Value (taking into account their actual condition). If Lessor does not so elect to purchase such Severable Modifications, Lessee may remove such Severable Modifications at Lessee's cost and expense, and if requested (which request shall be made by not less than 90 days prior written notice in the case of a return other than pursuant to Section 15.6) by Lessor will so remove such Severable Modifications at Lessee's cost and expense, and Lessee shall, at its expense, repair any damage resulting from the removal of any such Severable Modifications in a manner consistent with Section Section 8.1; provided that such removal shall not (i) diminish the fair market value, residual value, utility or remaining economic useful life of the Unit to which such Severable Modifications relate below the fair market value, residual value, utility or remaining economic useful life thereof immediately prior to the addition of such Severable Modifications, in more than a de minimis respect, assuming such Unit was then at least in the condition required to be maintained by the terms of this Lease or (ii) cause such Unit to become "limited use property" within the meaning of Revenue Procedure 2001-28 or Revenue Procedure 2001-29. If Lessee has not removed any Severable Modification prior to the return of the related Unit as 17 Lease Agreement (TRLI 2001-1B) provided herein, title to such Severable Modification shall pass to Lessor as of the date of such return.

Optional Modifications. Lessee at any time may or may permit a Sublessee to, in its discretion and at its own or such Sublessee's cost and expense, expense modify, alter or improve any Unit in a manner which is not required by Section 9.1 (a "Modification"); provided that no Modification (i) shall diminish the fair market value, utility, estimated residual value, utility value or remaining economic useful life of such Unit below the fair market value, utility, estimated residual value, utility value or remaining economic useful life thereof immediately prior to such Modification, other than in more than a de minimis respectmanner, assuming such Unit was then at least in the condition required to be maintained by the terms of this Lease Lease, or (ii) cause such Unit to become "limited use property" within the meaning of Revenue Procedure 2001-28 or Revenue Procedure 2001-29Limited Use Property. Title to any Non-Severable Modification shall be immediately vested in Lessor. Title to any Severable Modification (other than Required Modifications) shall remain with Lessee or the Sublessee as applicableunless it is a Required Modification, in which case title shall vest in Lessor pursuant to Section 9. 1. If Lessee shall Lessee, at its cost and expense, shall cause such any Severable Modifications (other than which are not Required Modifications) to be made to any Unit, Lessee shall give written notice to Lessor briefly describing such Severable Modifications not less than 120 days prior to the return other than pursuant to Section 15.6 of such Unit to Lessor hereunder and Lessor shall have the right, upon 90 days prior written notice in the case of a return other than pursuant to Section 15.6, prior to the return of such Unit pursuant to Section 6.1Lessor hereunder, to purchase any such Severable Modifications (other than Severable Modifications consisting of proprietary or communications equipment) title to which is held by Lessee at their then Fair Market Sales Value (taking into account their actual condition). If Lessor does not so elect to purchase such Severable Modifications, Lessee may remove such Severable Modifications at Lessee's cost and expenseexpense and, and if requested (which request shall be made by not less than 90 days prior written notice in the case of a return other than pursuant to Section 15.6) by Lessor will so remove such Severable Modifications at Lessee's cost and expense, and Lessee shall, at its expense, repair any damage resulting from the removal of any such Severable Modifications in a manner consistent with Section 8.1; provided that such removal shall not (i) diminish the fair market value, residual value, utility or remaining economic useful life of the Unit to which such Severable Modifications relate below the fair market value, residual value, utility or remaining economic useful life thereof immediately prior to the addition of such Severable Modifications, in more than a de minimis respect, assuming such Unit was then at least in the condition required to be maintained by the terms of this Lease or (ii) cause such Unit to become "limited use property" within the meaning of Revenue Procedure 2001-28 or Revenue Procedure 2001-29. If Lessee has not removed any Severable Modification prior to the return of the related Unit as provided herein, title to such Severable Modification shall pass to Lessor as of the date of such return.