Washington state marijuana laws go up in smoke. From December 6, it's legal in Washington state to possess up to one ounce of marijuana. The only problem? There's nowhere to legally buy it yet. And it's still an offense under federal law. Medical marijuana dispensaries, like Abigail Gurthrie's, still can't sell to anyone without a prescription. "People in the community on December 6th will be allowed to possess marijuana. They will not be able to come in to any dispensary and obtain it."