53 Pa. Stat. § 4593
The mayor of said cities is hereby authorized to appoint a board of examiners, to consist of one member of the board or bureau of health, one plumbing inspector, and two competent plumbers in no wise connected with the city government, who shall examine all applicants for license under the provisions of this act. The Secretary of Health of the Department of Health of this Commonwealth, in the case of boroughs and incorporated towns and townships of the first class, is hereby authorized to appoint a board of examiners, to consist of such master plumbers or journeymen plumbers of ten years experience, as he may designate, who shall examine all applicants for license under the provisions of this act outside of cities. In the performance of this duty he shall divide the State into a convenient number of districts, and appoint separate boards for the several districts, or shall direct that applicants from certain districts shall submit themselves to examination by city boards in certain cities designated by him, and shall also, upon satisfactory evidence, that certain municipalities outside of cities have constituted a competent board of examiners appointed by the council of said borough, direct that the applicants be examined by such board. The said boards shall make all reasonable rules, regulations, and examinations, which shall be approved by the said director of the department or board or bureau of health in the case of cities, and by the Secretary of Health in all other cases. An examination of any one member of a firm or corporation therefor, shall be deemed sufficient. Said person or persons, firm or corporation, engaged or engaging in the business of plumbing or house or building drainage, shall pay for each examination the sum of ten dollars, and each journeyman or person engaged in the work shall pay the sum of five dollars, which sum shall be paid into the State, city or other municipal treasury. The proper officers are hereby authorized to pay to the plumbers acting on said board the sum of ten dollars per day, for each day or session thus actually employed.
53 P.S. § 4593