Train service employees in chain-gang regularly set up will be called first-in first-out of terminal points on their respective sections. EXAMPLE: Crew "A" arrives at terminal 1030 hours, off duty 1230 hours; Crew "B" arrives at terminal 1045 hours, off duty 1130 hours. Crew "A" would be considered "first in" and would be called ahead of crew "B", providing that crew "A" is off duty and available for call at the time a crew is required. In other words, there may be a situation where a crew is required for 1330 hours which would necessitate calling this crew at 1130 hours, and since crew "A" is still on duty, it would be necessary to call crew "B".
