Maryland State Personnel and Pensions Section 25-307

      (a)      Creditable service on which the allowance of a member is based consists of:

            (1)      eligibility service, except as provided in subsection (b) of this section; and

            (2)      credit for unused sick leave as provided in § 20-206 of this article.

      (b)      A member's creditable service for a period of regular part-time employment equals the member's actual employment during that period.