Any employee who reports, when requested, for work other than his regularly scheduled hours shall be guaranteed two (2) hours of pay at his overtime rate. The employee shall be guaran teed the overtime rate of pay for the actual time worked, but no less than two (2) hours pay at the overtime rate. Time spent in staff meetings scheduled by the Chief/Director of the Department shall be excluded from this provision. The terms of this Section shall not apply to "Acting Time" as set forth in Section 2113.25 hereof.