Md. Code, Bus. Reg. § 9A-403

(a) Each individual whom the State, a county, or a local government appoints or employs as a heating, ventilation, air-conditioning, and refrigeration inspector shall: (1) each year attend a continuing education course that the Board or, with the approval of the Board, a county or local government conducts; and (2) meet minimum standards that are: (i) established by the Board; and (ii) administered: 1. for a county or local government inspector, by the county or local government that appoints or employs the inspectors; and 2. for a State inspector by the State. (b) An individual may not have any financial interest in any business that provides heating, ventilation, air-conditioning, or refrigeration services while employed by the State, a county, or any local government as a heating, ventilation, air-conditioning, and refrigeration inspector. (c) (1) On appointment or employment, the individual shall place any license that the inspector holds on inactive status subject to § 9A-309 of this title. (2) The Board may issue a heating, ventilation, air-conditioning, and refrigeration inspector identification card to an inspector who has placed the appropriate licensee on inactive status. (3) On termination of the appointment or employment of an individual as a heating, ventilation, air-conditioning, and refrigeration inspector, the Board shall reactivate the license of the individual who is on inactive status, without examination, if the individual: (i) makes a written request to the Board; and (ii) pays to the Board a reactivation fee established by the Board.