53 Pa. Stat. § 13131
Subject to the limitations hereinafter prescribed, the city taking advantage of this act and framing and adopting or amending its charter thereunder shall have and may exercise all powers and authority of local self-government and shall have complete powers of legislation and administration in relation to its municipal functions, including the power and authority to prescribe the elective city officers, who shall be nominated and elected only in the manner provided by, and in accordance with, the provisions of the Pennsylvania Election Code and its amendments, for the nomination and election of municipal officers. The charter of any city adopted or amended in accordance with this act may provide for a form or system of municipal government and for the exercise of any and all powers relating to its municipal functions, not inconsistent with the Constitution of the United States or of this Commonwealth, to the full extent that the General Assembly may legislate in reference thereto as to cities of the first class, and with like effect, and the city may enact ordinances, rules and regulations necessary and proper for carrying into execution the foregoing powers and all other powers vested in the city by the charter it adopts or by this or any other law. Ordinances, rules and regulations adopted under the authority of this act or under the provisions of any charter adopted or amended hereunder shall be enforceable by the imposition of fines, forfeitures and penalties, not exceeding two thousand three hundred dollars ($2,300), and by imprisonment for a period not exceeding ninety days. Notwithstanding the other provisions of this section, a city of the first class may increase any fine, forfeiture or penalty authorized under this section, provided that the increase does not exceed four hundred dollars ($400) in any calendar year and the total amount of the fine, forfeiture or penalty does not exceed two thousand dollars ($2,000).
53 P.S. § 13131