2615 - Excuse by failure of presupposed conditions.

     § 2615.  Excuse by failure of presupposed conditions.        Except so far as a seller may have assumed a greater     obligation and subject to section 2614 (relating to substituted     performance):            (1)  Delay in delivery or non-delivery in whole or in        part by a seller who complies with paragraphs (2) and (3) is        not a breach of his duty under a contract for sale if        performance as agreed has been made impracticable by the        occurrence of a contingency the non-occurrence of which was a        basic assumption on which the contract was made or by        compliance in good faith with any applicable foreign or        domestic governmental regulation or order whether or not it        later proves to be invalid.            (2)  Where the causes mentioned in paragraph (1) affect        only a part of the capacity of the seller to perform, he must        allocate production and deliveries among his customers, but        may at his option include regular customers not then under        contract as well as his own requirements for further        manufacture. He may so allocate in any manner which is fair        and reasonable.            (3)  The seller must notify the buyer seasonably that        there will be delay or nondelivery and, when allocation is        required under paragraph (2), of the estimated quota thus        made available for the buyer.        Cross References.  Section 2615 is referred to in section     2616 of this title.