Section 8324 - Right of contribution(a) General ruleThe right of contribution exists among joint tort-feasors.(b) Payment required.A joint tort-feasor is not entitled to a money judgment for contribution until he has by payment discharged the common liability or has paid more than his pro rata share thereof.(c) Effect of settlementA joint tort-feasor who enters into a settlement with the injured person is not entitled to recover contribution from another joint tort-feasor whose liability to the injured person is not extinguished by the settlement.1976, July 9, P.L. 586, No. 142, § 2, effective 6/27/1978.