How long can alandlord keep last months rent in escrow. Does he have to give it back when renewing leases?

I live in pa and thought that after the 2nd yr I could apply this to the last month of the second year since i am staying for a third. Pa LAw prevents holding a security dposit of more then 1 month after yr 2 of a lease. But the law says nothing about the final months rent??/Its a legal gray area

Passive Income