In Pennsylvania, leases for terms of more than three years need to be written. A lease for a term of fewer than three years can be made orally.To create a Pennsylvania lease agreement, you can use a template or consult a lawyer. Make sure you are not just filling in a blank on a contract just because that is what you always do. How to fill out the Pennsylvania Commercial Lease Agreement Template? 1. Enter the effective date of the lease. 2. Therefore, tenants should negotiate for an out clause a clause that allows tenants to get out of the lease early or a mitigation clause.