§ 62A.1-205. Course of dealing and usage of trade
(1) A course of dealing is a sequence of previous conduct between the parties to a particular transaction which is fairly to be regarded as establishing a common basis of understanding for interpreting their expressions and other conduct.
(2) A usage of trade is any practice or method of dealing having such regularity of observance in a place, vocation or trade as to justify an expectation that it will be observed with respect to the transaction in question. The existence and scope of such a usage are to be proved as facts. If it is established that such a usage is embodied in a written trade code or similar writing the interpretation of the writing is for the court.
(3) A course of dealing between parties and any usage of trade in the vocation or trade in which they are engaged or of which they are or should be aware give particular meaning to and supplement or qualify terms of an agreement.
(4) The express terms of an agreement and an applicable course of dealing or usage of trade shall be construed wherever reasonable as consistent with each other; but when such construction is unreasonable express terms control both course of dealing and usage of trade and course of dealing controls usage of trade.
(5) An applicable usage of trade in the place where any part of performance is to occur shall be used in interpreting the agreement as to that part of the performance.
(6) Evidence of a relevant usage of trade offered by one party is not admissible unless and until he has given the other party such notice as the court finds sufficient to prevent unfair surprise to the latter.
[1965 ex.s. c 157 § 1-205. Cf. former RCW sections: (i) RCW 63.04.100(1); 1925 ex.s. c 142 § 9; RRS § 5836-9. (ii) RCW 63.04.160(5); 1925 ex.s. c 142 § 15; RRS § 5836-15. (iii) RCW 63.04.190(2); 1925 ex.s. c 142 § 18; RRS § 5836-18. (iv) RCW 63.04.720; 1925 ex.s. c 142 § 71; RRS § 5836-71.]
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