Covered service assignment
Covered service assignment means -
(1) For a train employee, each unique assignment of the employee during a period of covered service that is associated with either a specific train or a specific yard job.
(2) For a signal employee, the assigned duty hours of the employee, including overtime, or unique trouble call assignments occurring outside the employee's assigned duty hours.
(3) For a dispatching service employee, each unique assignment for the employee that occurs within any 24-hour period in which the employee, by the use of an electrical or mechanical device, dispatches, reports, transmits, receives, or delivers orders related to or affecting train movements.