It shall be unlawful for any person to lease or make a sale or contract for sale of goods, wares, merchandise, machinery, supplies, or other commodities, or services, whether patented or unpatented, for use, consumption, enjoyment, or resale, or fix a price charged therefor, or discount from, or rebate upon, such price, on the condition, agreement, or understanding that the lessee or purchaser thereof shall not use or deal in the goods, wares, merchandise, machinery, supplies, or other commodity or services of a competitor or competitors of the lessor or seller, where the effect of such lease, sale, or contract for such sale or such condition, agreement, or understanding may be to substantially lessen competition or tend to create a monopoly in any line of commerce.
RCW 19.86.050
Transactions and agreements not to use or deal in commodities or services of competitor declared unlawful when lessens competition.
Known as the Consumer Protection Act
The act spans §§ 19–19 (26 sections).
Applied in 7 court decisions — leading case 128 Wash. 2d 656 - Tanner Electric Cooperative v. Puget Sound Power & Light (1996)
1961 c 216 s 5.
How often courts cite this section
Court decisions citing this, by year. The dip in the last several years is a data-coverage gap, not a real trend — our corpus holds fewer opinions from the most recent years, so recent citations are undercounted.
Official source: Washington State Legislature. Reproduced from public-domain Washington statutes; confirm against the official source for the current text. Not legal advice.