Vacation and Compensatory Leave. Librarians shall accrue twenty (20) days of vacation per fiscal year, prorated if necessary from the start date of employment plus a cap of seven (7) days accrued leave to be taken during break periods. Vacation shall be taken at the mutual convenience of the librarian and the immediate supervisor of that librarian and may not be carried over to the following fiscal year. Compensatory leave will be available if a librarian works for an extended period beyond scheduled hours or works during off-hours by reason, for example, of extended library hours during the examination period.