Maryland State Personnel and Pensions Section 25-401
§ 25-401.
  (a)   A member may retire with a normal service retirement allowance if:
    (1)   on or before the date of retirement, the member has at least 20 years of eligibility service;
    (2)   for at least 5 years immediately before retirement, the member was a security attendant at Clifton T. Perkins Hospital Center, a correctional officer in any of the first six job classifications, or in a combination of these positions; and
    (3)   the member completes and submits a written application to the Board of Trustees stating the date when the member desires to retire.
  (b)   On retirement under this section, a member is entitled to receive a normal service retirement allowance that equals one fifty-fifth of the member's average final compensation multiplied by the number of years of creditable service.