Iowa R. Civ. P. 1.245
As amended through September 9, 2024
A pleading may state as a cross-claim any claim by one party against a coparty arising out of the transaction or occurrence that is the subject matter either of the original action or a counterclaim therein or relating to any property that is the subject matter of the original action. Such cross-claim may include a claim that the party against whom it is asserted is or may be liable to the cross-claimant for all or part of a claim asserted in the action against the cross-claimant.
Iowa. R. Civ. P. 1.245