35 Pa.C.S. § 7336

If a person holds a license, certificate or other permit issued by a participating political subdivision or the Commonwealth evidencing qualification in a professional, mechanical or other skill and the assistance of that person or entity is requested by a participating political subdivision, the person shall be deemed to be licensed, certified or permitted in the political subdivision requesting assistance for the duration of the incident response or authorized drills or exercises and subject to any limitations and conditions the chief executive of the participating political subdivision receiving the assistance may prescribe by executive order or otherwise.