RULE 78. ATTENDING COURT.   (a) Conductors and brakemen attending court or other business on behalf of the Company (other than attending investigations) will be paid as follows, together with necessary expenses:

       (b) Conductors and brakemen in pool freight or assigned service will receive what they would have earned had they remained on assignment, and if used on layover day, will receive a minimum day's pay.

       (c) Extra men will be allowed a minimum day's pay at minimum rate applicable to class of service in which assigned for each calendar day held.

       (d) If an extra man is held from regular assignment, he will be entitled to what he would have earned on the assignment for such time as he is eligible to hold it. In case extra man could not hold a regular assignment during full period of time he is on company business, he will be entitled to only a minimum day's pay in the class of service to which assigned for the days on which he could not hold a regular assignment.

       (e) Any fee or mileage accruing will be assigned to the railroad.