Pennsylvania is currently an unlicensed state until either HB 1805 or SB 359 are enacted. And from what everyone is saying, that’s might not happen for a while since both bills are written so poorly.
The City of Philadelphia and Allegany County are the only home inspector licenses issued in the State of Pennsylvania. The City of Philadelphia requires that you be a member of a national home inspection association with members in more than 10 states, provide proof of general liability insurance, provide proof of certification by a national home inspector association. Keep in mind, ASHI and NAHI both require that you take the NHIE in order to become certified. InterNACHI has their own exam and does not rely on a customized version of the NHIE taylor made for that association.
If you have questions about Philadelphia licensing, feel free to cntact me offline and I will help as much as I can.