MAINTENANCE OF JOINT SICK LEAVE BANK AND EXCHANGE. 7.1 Initial Donations New employees may elect to join the Joint Sick Leave Bank and Exchange within 30 calendar days of initial employment or during the open enrollment in September. Joint Sick Leave Bank and Exchange membership requires an initial donation of one sick leave day per member. To participate, current employees (those not new to SMCPS) must have at least 10 days of accrued sick leave. New Joint Sick Leave Bank and Exchange members cannot be asked to donate more than one sick leave day in their initial year of enrollment.