A force majeure clause can excuse one or both parties from fulfilling a contract's terms when an unforeseeable event occurs. In New York, the enforceability of a force majeure clause will depend on its precise wording and express terms.In construction contracts, a force majeure clause is one which can relieve a party of its obligations following a force majeure event. This inevitably resulted in many attorneys, who may have only dealt with the concepts of Force. It applies where a supervening event fundamentally changes the nature of a contract and makes one party's performance worthless to the other. A force majeure clause is based on the parties' agreement.