310. Frustration.

Where the execution of the works is rendered impossible by the occurrence of an event which was not foreseen at the time of the contract, the contract may be frustrated1. Frustration occurs whenever the law recognises that without the default of either party a contractual obligation has become incapable of being performed because the circumstances in which performance is called for would render it a thing radically different from that which was undertaken by the contract2. A contractor cannot disregard the contract and claim on a quantum meruit basis merely because, by reason of a shortage of labour, the