
Which Law governs the Rules for Sale and Distribution of Goods in Seattle
The rules related to sales and distribution of goods are encompassed as a part of the Commercial law. The law is also related to the procedures for payments in such transactions.
http://www.law.seattleu.edu/Library/Online_Resources/Research_Guides/Commercial_Law_and_the_Uniform_Code.xml
In 1952, the uniform Commercial Code was published for the first time. However, several revisions have been done after that and some of the new articles have also been added.
There is also a research guide in place which lists some of the major sources of law in the area and a variety of tools for the researcher to use when confronted with a commercial law issue. Links in this research guide will take the researcher to information about the resource, and in some cases, will link to full text of the resource.

