Except as otherwise provided in this section, “service” means the sum of each period of a member’s employment with a participating employer. Except as provided in subsection (c) of this section, “service” does not include any period of employment:that has been credited as service under any other City retirement plan for calculating the amount of a retirement benefit or a deferred vested retirement benefit; or during which the member was not receiving earnable compensation for any portion of a pay period from the participating employer. The exclusions of subsection (b) of this section do not apply to any period of employment credited to a hybrid member for service as a Class D member of the Employees’ Retirement System. If a member transfers service to any other City retirement plan, that transferred service may not be counted to determine whether the member is vested in his or her employer contribution sub-account. Ord. 14-216 Ord. 20-458