Maryland Code, Business Occupations and Professions § 16-3A-01

(1) an individual who is employed as a building code enforcement official by the State or a political subdivision of the State, while acting within the scope of that employment;

(2) an individual who is employed as a federal or State inspector, while acting within the scope of that employment;

(3) a plumber, electrician, professional engineer, real estate appraiser, real estate broker or agent, or heating, ventilation, air-conditioning, or refrigeration contractor who is licensed in the State, while acting within the scope of that license;

(4) a roofer, general contractor, remodeler, or structural pest control specialist, while acting within the scope of that occupation; or

(5) any other professional whose services may be required in the building or remodeling of real property and who does not claim to be a licensed home inspector.