From www.handgunlaw.us:
Maine/Pennsylvania Drop Reciprocity!
Pennsylvania has removed Maine from the list of states it had a reciprocity agreement with. PA now just lists them as a state a PA resident can apply for a non resident permit. When Maine went permitless carry they also changed their statute on how they honor other states. They removed reciprocity from their law and now it just states they will honor anyone who honors them. Maine removed the listing of 8 states they had agreements with and replaced it with a link to their new statute. Agreements usually have a inform clause stating if a states laws change that could affect the agreement the state will notify the other state. Maine most likely did and so the PA AG dropped them. They could have honored them without an agreement as they honor about a dozen other states without an agreement. Handgunlaw.us has been updated to show this change in reciprocity. You can see both states listings at the links below.
State Police: Licenses & Permits: Concealed Handgun Permits
https://www.attorneygeneral.gov/Medi...ty_Agreements/