108 STAT. 890 PUBLIC LAW 103-272—JULY 5, 1994 (3) Time spent returning from a trouble call, whether the employee goes directly to the employee's residence or by way of the employee's headquarters, is neither time on duty nor time off duty, except that up to one hour of that time spent returning from the final trouble call of a period of continuous or broken service is time off duty. (4) If, at the end of scheduled duty hours, an employee has not completed the trip from the final outlying worksite of the duty period to the employee's headquarters or directly to the employee's residence, the time after the scheduled duty hours necessarily spent in completing the trip to the residence or headquarters is neither time on duty nor time off duty. (5) If an employee is released from duty at an outlying worksite before the end of the employee's scheduled duty hours to comply with this section, the time necessary for the trip from the worksite to the employee's headquarters or directly to the employee's residence is neither time on duty nor time off duty. (6) Time spent in transportation on an ontrack vehicle, including time referred to in paragraphs (3)-(5) of this subsection, is time on duty. (7) A regularly scheduled meal period or another release period of at least 30 minutes but not more than one hour is time off duty and does not break the continuity of service of the employee under this section, but a release period of more than one hour is time off duty and does break the continuity of service. (c) EMERGENCIES. —^A signal employee may be allowed to remain or go on duty for not more than 4 additional hours in any period of 24 consecutive hours when an emergency exists and the work of that employee is related to the emergency. In this subsection, an emergency ends when the signal system is restored to service, §21105. Limitations on duty hours of dispatching service employees (a) APPLICATION.— This section applies, rather than section 21103 or 21104 of this title, to a train employee or signal employee during any period of time the employee is performing duties of a dispatching service employee. (b) GENERAL. — Except as provided in subsection (d) of this section, a dispatching service employee may not be required or allowed to remain or go on duty for more than— (1) a total of 9 hours during a 24-hour period in a tower, office, station, or place at which at least 2 shifts are employed; or (2) a total of 12 hours during a 24-hour period in a tower, office, station, or place at which only one shift is employed. (c) DETERMINING T^ME ON DUTY. —Under subsection (b) of this section, time spent performing any other service for the railroad carrier during a 24-hour period in which the employee is on duty in a tower, office, station, or other place is time on duty in that tower, office, station, or place. (d) EMERGENCIES. —When an emergency exists, a dispatching service employee may be allowed to remain or go on duty for not more than 4 additional hours during a period of 24 consecutive hours for not more than 3 days during a period of 7 consecutive days.
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