Employers brought action against city, city clerk, and Port of Seattle, which was a special-purpose municipal corporation that, among other things, owned and operated the airport, challenging voter initiative that established a $15–per–hour minimum wage and other benefits and rights for employees in the hospitality and transportation industries. Committee that circulated petition as required to get initiative on the ballot intervened. The Superior Court entered partial summary judgment. Coalition and city sought review and employers sought cross-review.
The Supreme Court of Washington held that:
- Initiative did not violate the single-subject rule;
- Law resulting from initiative was enforceable at airport;
- Law was not entirely preempted by National Labor Relations Act;
- Initiative was not preempted by Americans with Disabilities Act (ADA); and
- Initiative did not violate the dormant Commerce Clause.