HOURS OF WORK AND OVERTIME 13.1 The standard work week shall consist of five (5) consecutive work days of eight (8) hours each and shall be scheduled Monday through Friday. 13.2 Shift working hours shall be 7:00 a.m. to 3:30 p.m. 13.2.1 Any change from the working hours stated in 13.2 must be mutually agreed upon between the parties. 13.3 Employees covered by this Agreement shall be provided a fifteen (15) minute rest period during the middle of each half of their work day except for employees whose work day consists of eight (8) consecutive hours of work. 13.4 Employees covered by this Agreement shall be provided a meal time not to exceed one- half (1/2) hour except for employees whose work day consists of eight (8) consecutive hours of work. 13.5 Rest periods are not cumulative and are lost if not taken. 13.6 All work performed in excess of eight (8) hours in any work day or forty (40) hours in any work week shall be considered as overtime and shall be paid for at the overtime rate of two (2) times the straight time rate of pay. Employees may be required to work overtime when requested. 13.7 Employees regularly scheduled to work on any recognized paid holiday shall be paid for the holiday in addition to one and one-half (1-1/2) times their regular straight time hourly rate of pay for all hours worked. 13.8 Employees in classifications whose functions do not normally require holiday work but who are specifically called for emergency work on any recognized paid holiday shall be paid at the double time rate for the actual hours worked, in addition to the regular rate of pay except as provided in Section 20.4 for "High Climb." 13.9 Employees shall receive an amount not less than the equal of four (4) hours straight- time pay each time called out from their homes at times other than regular working hours (non- scheduled overtime). They shall be paid the regular overtime rates from the time they leave home until they return to their homes, except no pay shall be allowed while eating or sleeping; provided, however, that if employees are notified before leaving their regular daily work to report for duty after regular working hours (scheduled overtime), they shall be paid only from the time they report to headquarters until the time of their return to headquarters, but in any event not less than the equal of four (4) hours straight time pay. 13.10 Employees called for non-scheduled overtime duty less than four (4) hours before beginning of regular working hours, or their shift hours, shall be paid at the rate of double time (except intermission for meals) from the time they are called until the beginning of their regular working hours or shift hours. Regular hours or shift hours shall be at straight time. 13.11 Scheduled overtime" relates to employees instructed before quitting time, or notified at least twelve (12) hours in advance of starting time, to report for overtime work at a stated hour. 13.12 Non-scheduled overtime" relates to employees who are instructed, without notice as defined under "scheduled overtime," to report for emergency overtime work.