Maryland Code, State Personnel and Pensions § 37-203

(b)(1) An individual may not transfer service credit under this title unless the individual makes a claim for the service credit within 1 year after becoming a member of the new system.

(2) An individual may not transfer service credit from one contributory system to another contributory system unless within 1 year after becoming a member of the new system the individual deposits in the annuity savings fund or other corresponding fund of the new system the total accumulated contributions to the individual's credit in the annuity savings fund or other corresponding fund of the previous system.

(e)(1) Except as provided in paragraph (2) of this subsection, if an individual transfers service credit under this title, the previous system shall refund the individual's accumulated contributions on request.

(2) Accumulated contributions applicable to the receipt of service credit or benefits in the new system may not be refunded if:

(f)(1) Except as otherwise provided in this subsection, after an individual transfers service credit to a new system under this title, the individual:

(2) Except as provided in § 37-204 of this subtitle, if an individual transfers from a noncontributory system to a contributory system, on retirement the individual's retirement allowance shall be reduced by the actuarial equivalent of the member contributions that would have been deducted if the individual had earned the transferred service credit under the new system, including regular interest on those contributions.