N.D. Cent. Code § 41-02-78

(4) Increased cost alone does not excuse performance unless the rise in cost is due to some unforeseen contingency which alters the essential nature of the performance. Neither is a rise or a collapse in the market in itself a justification, for that is exactly the type of business risk which business contracts made at fixed prices are intended to cover. But a severe shortage of raw materials or of supplies due to a contingency such as war, embargo, local crop failure, unforeseen shutdown of major sources of supply or the like, which either causes a marked increase in cost or altogether prevents the seller from securing supplies necessary to his performance, is within the contemplation of this section. (See Ford & Sons, Ltd., v. Henry Leetham & Sons, Ltd., 21 Com.Cas. 55 (1915, K.B.D.).)

(5) Where a particular source of supply is exclusive under the agreement and fails through casualty, the present section applies rather than the provision on destruction or deterioration of specific goods. The same holds true where a particular source of supply is shown by the circumstances to have been contemplated or assumed by the parties at the time of contracting. (See Davis Co. v. Hoffmann-LaRoche Chemical Works, 178 App.Div. 855, 166 N.Y.S. 179 (1917) and International Paper Co. v. Rockefeller, 161 App.Div. 180, 146 N.Y.S. 371 (1914).) There is no excuse under this section, however, unless the seller has employed all due measures to assure himself that his source will not fail. (See Canadian Industrial Alcohol Co., Ltd., v. Dunbar Molasses Co., 258 N.Y. 194, 179 N.E. 383, 80 A.L.R. 1173 (1932) and Washington Mfg. Co. v. Midland Lumber Co., 113 Wash. 593, 194 P. 777 (1921).)

(6) In situations in which neither sense nor justice is served by either answer when the issue is posed in flat terms of “excuse” or “no excuse,” adjustment under the various provisions of this Article is necessary, especially the sections on good faith, on insecurity and assurance and on the reading of all provisions in the light of their purposes, and the general policy of this Act to use equitable principles in furtherance of commercial standards and good faith.

(7) The failure of conditions which go to convenience or collateral values rather than to the commercial practicability of the main performance does not amount to a complete excuse. However, good faith and the reason of the present section and of the preceding one may properly be held to justify and even to require any needed delay involved in a good faith inquiry seeking a readjustment of the contract terms to meet the new conditions.

(8) The provisions of this section are made subject to assumption of greater liability by agreement and such agreement is to be found not only in the expressed terms of the contract but in the circumstances surrounding the contracting, in trade usage and the like. Thus the exemptions of this section do not apply when the contingency in question is sufficiently foreshadowed at the time of contracting to be included among the business risks which are fairly to be regarded as part of the dickered terms, either consciously or as a matter of reasonable, commercial interpretation from the circumstances. (See Madeirense Do Brasil, S.A. v. Stulman-Emrick Lumber Co., 147 F.2d 399 (C.C.A., 2 Cir., 1945).) The exemption otherwise present through usage of trade under the present section may also be expressly negated by the language of the agreement. Generally, express agreements as to exemptions designed to enlarge upon or supplant the provisions of this section are to be read in the light of mercantile sense and reason, for this section itself sets up the commercial standard for normal and reasonable interpretation and provides a minimum beyond which agreement may not go.

(9) The case of a farmer who has contracted to sell crops to be grown on designated land may be regarded as falling either within the section on casualty to identified goods or this section, and he may be excused, when there is a failure of the specific crop, either on the basis of the destruction of identified goods or because of the failure of a basic assumption of the contract.

(10) Following its basic policy of using commercial practicability as a test for excuse, this section recognizes as of equal significance either a foreign or domestic regulation and disregards any technical distinctions between “law,” “regulation,” “order” and the like. Nor does it make the present action of the seller depend upon the eventual judicial determination of the legality of the particular governmental action. The seller’s good faith belief in the validity of the regulation is the test under this Article and the best evidence of his good faith is the general commercial acceptance of the regulation. However, governmental interference cannot excuse unless it truly “supervenes” in such a manner as to be beyond the seller’s assumption of risk. And any action by the party claiming excuse which causes or colludes in inducing the governmental action preventing his performance would be in breach of good faith and would destroy his exemption.

(11) An excused seller must fulfill his contract to the extent which the supervening contingency permits, and if the situation is such that his customers are generally affected he must take account of all in supplying one. Subsections (a) and (b), therefore, explicitly permit in any proration a fair and reasonable attention to the needs of regular customers who are probably relying on spot orders for supplies. Customers at different stages of the manufacturing process may be fairly treated by including the seller’s manufacturing requirements. A fortiori, the seller may also take account of contracts later in date than the one in question. The fact that such spot orders may be closed at an advanced price causes no difficulty, since any allocation which exceeds normal past requirements will not be reasonable. However, good faith requires, when prices have advanced, that the seller exercise real care in making his allocations, and in case of doubt his contract customers should be favored and supplies prorated evenly among them regardless of price. Save for the extra care thus required by changes in the market, this section seeks to leave every reasonable business leeway to the seller.