The document discusses the concept of Nachfrist, which allows an aggrieved party in a contract to grant the non-performing party an additional period of time to fulfill their contractual obligations under various international sales laws. Specifically, it examines how Nachfrist operates under the CISG, UNIDROIT Principles, and PECL. It outlines the procedures for granting Nachfrist, including fixing a reasonable time period and the effects it has in suspending remedies for the aggrieved party during the additional period. Termination rights arise if performance is still not met by the end of the Nachfrist period. Overall, Nachfrist provides a mechanism for parties to resolve delays without immediately terminating the contract.