Md. Code Ann., Pub. Safety § 3-314
The State and any subdivision or municipal corporation of the State shall have the immunity from liability described under § 5-613 of the Courts Article unless the subdivision or municipal corporation requests the appointment of an individual as a special police officer and the request is granted as provided in this subtitle.
Added by Acts 2003, c. 5, § 2, eff. Oct. 1, 2003.