53 Pa. Stat. § 13401
From and after the first day of January, one thousand nine hundred and forty-six, the salaries, wages and other compensation of all public officers, clerks and employes, including all officers, clerks and employes whose salaries were heretofore fixed by law or by the courts, payable out of the treasury of any city of the first class, shall be fixed and determined by the council of such city, by ordinance, except such salaries of elected officers which are or may be fixed by law and except that the annual salary of the prothonotary shall not be less than fifteen thousand dollars ($15,000), the annual salary of the principal deputy prothonotary shall not be less than eleven thousand dollars ($11,000), and the annual salary of the second deputy prothonotary shall not be less than nine thousand dollars ($9,000).
53 P.S. § 13401