The CISG makes no provision for "trade usages" since everything is defined.

Question

Quizplus · Accepted Answer

The CISG does recognize the importance of trade usages in interpreting and understanding contractual terms. Article 9 specifies that the parties should be guided by any "usages to which they have agreed" and any "practices which they have established between themselves," as well as any relevant "usages of which the parties knew or ought to have known."

The CISG Makes No Provision for "Trade Usages" Since Everything