Meanwhile, state lawmakers will defend their use of 'legislative privilege' to hide messages from the public in a case brought by the Washington Coalition of Open Government and others.
Perhaps lawmakers' strongest action on firearms regulations to date, the proposal needs one more vote in the House before going to the desk of Gov. Inslee.
The 7-2 decision, which reverses a lower court ruling, is the latest development in nearly a century of fights over how to structure the state tax system.