Is there preemption?
Yes.
What is the preemption statute?
43 Pa. Stat. Ann. § 333.114a as passed by the Minimum Wage Act of 1968:
“Section 14.1. Preemption: (a) Except as set forth in subsection (b), this act shall preempt and supersede any local ordinance or rule concerning the subject matter of this act.
(b) This section does not prohibit local regulation pursuant to an ordinance which was adopted by a municipality prior to January 1, 2006, and which remained in effect on January 1, 2006”
Prior to 2006, there was no state law preemption on wages. As of 2006, this law explicitly prohibits municipalities from passing ordinances to change the minimum wage and ensures that power remains solely within the jurisdiction of the General Assembly.