Wash. Rev. Code § 66.12.195
Nothing in this title shall apply to or prevent the legislative gift center created in chapter 44.73 RCW from selling at retail for off-premises consumption wine produced in Washington by a licensed domestic winery.
RCW 66.12.195
Findings-Intent- 2009 c 228 : "The legislature finds that the production of wine grapes in the state is an important segment of Washington agriculture as evidenced by the continued investments made by the state in developing the wine industry, including the creation of viticulture and enology programs at Washington State University and wine technology programs at community and technical colleges. The legislature further finds that the promotion and sale of Washington wine at the legislative gift center is harmonious with the purpose of the gift center, which is to promote the state and the goods produced around the state. Therefore, the legislature intends to allow the legislative gift center to sell wine produced in Washington to visitors of legal drinking age." [2009 c 228 s 1.]