New rules governing the amount of medical marijuana Washington state patients can possess and grow went into effect Sunday. After holding public hearings and consulting with law enforcement, health workers, and medical marijuana advocates, the Washington State Department of Health has set those quantities as 24 ounces of usable marijuana and up to 15 plants.

Under Washington's medical marijuana law, patients are entitled to a 60-day supply, but just what constituted a 60-day supply had not been defined until now. While the new rules should provide some guidance and protection for patients, not everyone is happy.

One medical marijuana grower told KOMO-TV News the new rules could lead to a crackdown on growers who are growing for more than one patient. The Washington law does not allow for growing co-ops. "That's a totally ridiculous way to come up with a 60-day supply," he said, noting that he has 37 plants growing in his basement.

"Our goal in the rule making was to have a final rule that provided clarity for law enforcement, for patients and physicians and meets the needs that what we believe will be the majority of medical marijuana patients in Washington," said Karen Ann Jensen, assistant secretary for health systems and quality assurance, who made the recommendation and will oversee the rules change.