RULE 65. OVERTIME.  Except as indicated below or when changing off where it is the practice to work alternately days and nights for certain periods, working through two shifts to change off, or where exercising seniority rights, all time worked in excess of eight hours continuous service in a twenty-four hour period shall be paid for as overtime on a minute basis at one and one-half times the hourly rate.  

 In the application of this rule, the following shall govern:  

1. This rule applies only to service paid on an hourly or daily basis and not to service paid on mileage or road basis.  

2. A tour of duty in road service shall not be used to require payment of such overtime rate in yard service. (The term "road service" shall not apply to employees paid road rates, but governed by yard rules).  

3. Where an extra engineer commences work on a second shift in a twenty-four hour period, he shall be paid at time and one-half for such second shift except when it is started twenty-two and one-half to twenty-four hours from the starting time of the first shift.  A twenty-four hour period, as referred to in this rule, shall be considered as commencing for the engineer at the time he started to work on the last shift on which his basic day was paid for at the pro rata rate.  

4. An extra engineer changing to a regular assignment or a regularly assigned engineer reverting to the extra list shall be paid at the pro rata rate for the first eight hours of work following such change.  

5. Except as modified by other provisions of this rule, an extra employee working one shift in one grade of service and a second shift in another grade of service shall be paid time and one-half for the second shift, the same as though both shifts were in the same grade of service, except where there is another engineer available to perform the work at pro rata rate. (When an engineer is required to fill a hostler position, he will be considered in the same grade of service under this rule, and Section 3 shall apply).  

NOTE 1. Where a seniority board is in effect, in cases where there is a man or men on the board available for work at the pro rata rate, a senior man who exercises his seniority to work two shifts, the second of which would otherwise, under the provisions of this rule be paid at the over-time rate, shall be paid at the pro rata rate.  

NOTE 2. The adoption of this rule shall not affect any rule relating to service performed on a succeeding trick when an employees relief fails to report at the fixed starting time.