A city ordinance in Portland, Maine went into effect last Friday, December 6th that will allow those individuals who are 21 and over to possess up to 2.5 ounces of marijuana. The government passed the ordinance in November, while similar ordinances passed in three cities in Michigan. While residents are still subject to state and federal laws regarding marijuana possession, they sent local law enforcement a clear message about their priorities: voters in Portland do not want penalties associated…