Pennsylvania Statutes Title 75 Pa.C.S.A. Vehicles § 1713. Source of benefits

(a) General rule.--Except as provided in section 1714 (relating to ineligible claimants), a person who suffers injury arising out of the maintenance or use of a motor vehicle shall recover first party benefits against applicable insurance coverage in the following order of priority:

(b) Multiple sources of equal priority.--The insurer against whom a claim is asserted first under the priorities set forth in subsection (a) shall process and pay the claim as if wholly responsible. The insurer is thereafter entitled to recover contribution pro rata from any other insurer for the benefits paid and the costs of processing the claim. If contribution is sought among insurers responsible under subsection (a)(4), proration shall be based on the number of involved motor vehicles.