If the work of an employee for which compensatory time may be provided included work in a public safety activity, an emergency response activity, or a seasonal activity, the employee engaged in such work may accrue not more than 480 hours of compensatory time for hours worked after April 15, 1986 . If such work was any other work, the employee engaged in such work may accrue not more than 240 hours of compensatory time for hours worked after April 15, 1986 . Any such employee who, after April 15, 1986 , has accrued 480 or 240 hours, as the case may be, of compensatory time off shall, for additional overtime hours of work, be paid overtime compensation.