Md. Code, Public Safety § 13–213

(a) The Governor may adopt regulations that provide for the retirement of officers and enlisted individuals.

(b) The Governor may order a retired officer or enlisted individual to active duty.

(c) (1) There is a retired list exclusively restricted to retired officers and enlisted individuals of the organized militia.

(2) The retired list shall be divided into three groups of retired individuals:

(i) the National Guard;

(ii) the Maryland Defense Force; and

(iii) the Inactive National Guard.