Maryland State Personnel and Pensions Section 24-303

      Eligibility service for a member consists of service credit:

            (1)      for employment as a member;

            (2)      regained under § 24-304 of this subtitle by a member who redeposits accumulated contributions previously withdrawn;

            (3)      transferred from a retirement or pension system under Title 37 of this article;

            (4)      for military service as provided in Title 38 of this article; or

            (5)      purchased under this subtitle.