Maryland Code, Public Safety § 14-8A-02

The State, the governing body of a county or municipal corporation, or any other governmental agency within the National Capital Region may enter into a reciprocal agreement for the period that it considers advisable with a federal agency, the Commonwealth of Virginia, the District of Columbia, or a county or municipal corporation, within or outside the State, and establish, train, and implement plans to request or provide mutual aid through the use of its officers, employees, and agents, together with all necessary equipment, in accordance with § 7302 of the Intelligence Reform and Terrorism Prevention Act of 2004 (108 P.L. 458, 118 Stat. 3638).