Subject to § 12–305 of the Business Occupations and Professions Article, only the Commission may issue licenses to persons to work in the plumbing business in areas of Montgomery County or Prince George’s County under the jurisdiction of the Commission. License fees may not exceed the fees set in the Maryland Plumbing Act. The Commission shall exercise the authority of the State Board of Plumbing in areas under the jurisdiction of the Commission. A person holding a valid master plumber/gasfitter license or a journeyman plumber/gasfitter license issued by the Commission is entitled to an equivalent license issued by the State Board of Plumbing without examination on presentation of: the license issued by the Commission; and a notarized statement of good standing issued by the Commission. A person holding a valid master plumber/gasfitter license or a journeyman plumber/gasfitter license issued by the State Board of Plumbing is entitled to an equivalent license issued by the Commission without examination on presentation of the license issued by the State Board of Plumbing. Subject to §§ 10–14A–03 and 10–14B–03 of the State Government Article, an individual holding a valid master plumber/gasfitter license in another state is entitled to an equivalent license issued by the Commission without examination on presentation of the license issued by the Commission. A license issued to a master plumber/gasfitter or a journeyman plumber/gasfitter in good standing under a reciprocity arrangement by the State Board of Plumbing and the Commission before July 1, 1978, remains in force.