This subtitle does not affect:
(1) a sale or transfer for bona fide resale of a regulated firearm in the ordinary course of business of a licensee; or
(2) a sale, rental, transfer, or the use of a regulated firearm by a person authorized or required to do so as part of the person’s duties as a member of:
(i) an official police force or other law enforcement agency;
(ii) the armed forces, including all official reserve organizations; or
(iii) the Maryland National Guard.