What if an officer suspects a motorist is under the influence of pot?

"If an officer believes you're driving under the influence of anything, they will conduct a field sobriety test and may consult with a drug recognition expert," it says. "If officers establish probable cause, they will bring you to a precinct and ask your permission to draw your blood for testing. If officers have reason to believe you're under the influence of something, they can get a warrant for a blood draw from a judge. If you're in a serious accident, then a blood draw will be mandatory."

No longer will the smell of marijuana emanating from a vehicle lead to a search unless the officer has "information that you're trafficking, producing or delivering marijuana in violation of state law," it says.

Seattle does not hire police officers who have used marijuana in the previous three years, but the department is consulting its lawyers "to see if and how that standard may be revised."

Pot use and possession by anyone under age 21 is still a violation of state law. "It may be referred to prosecutors, just like if you were a minor in possession of alcohol," the police guide says.

The ban by universities and colleges on smoking pot on campus is not expected to change.