A Pierce County judge on Friday is scheduled to hear arguments on two key issues at the core of Wetherbee's legal challenge to the ban. The first is whether Washington's voter-approved marijuana measure, Initiative 502, leaves room for cities to ban licensed pot growers, processors or sellers. If the answer is no, Fife wants the judge to address a second question: Should Washington's entire legal marijuana scheme be thrown out as incompatible with the federal prohibition on pot?