From My Northwest:

“Initiative 1639 is unconstitutional in many respects and punishes law-abiding citizens, while doing nothing to keep firearms away from criminals,” said Shea in a written statement.
In its current form, the law represents the most sweeping, comprehensive gun control legislation in any state. It enacts waiting periods and background checks on the purchase of semi-automatic weapons, an increase to the minimum age for purchasing semi-automatic weapons from 18 to 21, storage requirements for firearms, and a class-C felony for any gun owner whose firearm is used by an unlicensed party.