Maryland Public Safety Section 7-101
§ 7-101.
  (a)   In this subtitle the following words have the meanings indicated.
  (b)   "Fire, rescue, or emergency medical services entity" means:
    (1)   a governmental subdivision, by its appropriate designated authority;
    (2)   a board or fire commission of a fire department or governmental subdivision;
    (3)   a fire department;
    (4)   a fire company;
    (5)   a rescue squad; or
    (6)   an emergency medical services unit, including an entity that provides emergency medical services at any level.
  (c)   (1)   "Mutual aid agreement" means an agreement to establish and carry out a plan to assist in extinguishing fires and preserving life and property by providing fire fighting, rescue, or emergency medical equipment, personnel, and services.
    (2)   "Mutual aid agreement" includes a reciprocal agreement entered into in accordance with former Article 38A, § 37 of the Code before July 1, 1989.