NYC plans new marijuana policy

• NEW: New York City police may write a ticket for small amounts of marijuana, officials said


• NEW: The policy change will only affect cases involving up to 25 grams of marijauna


• NEW: The mayor said the old law disproportionately affected minority youth


• NEW: A ticket has a lighter penalty than an arrest, police said

(CNN) -- New York City will change its policy on possession of small amounts of marijuana, giving police officers the option of writing offenders a ticket instead of taking them into custody, city officials said Monday at a press conference.

Mayor Bill de Blasio said the change will remove the stigma of a criminal conviction for many young people who are arrested for misdemeanor marijuana possession. Such a conviction can prevent people from getting a job or housing, he said.

"A summons will not affect their future," he said. "An arrest could."

The policy change, which goes into effect November 19, will only affect cases involving 25 grams (.88 ounce) or less of marijuana, Police Commissioner William Bratton said.

The officer can choose to write a citation, which requires the suspect to appear in court later, Bratton said. The marijuana would be seized and the person who had the marijuana would continue with their day. The fine for a first offense would usually be $100, officials said.

Officers will make judgment call

If the officer does decide to take the suspect into custody, the suspect would be handcuffed and taken to the station house for fingerprinting and a mugshot, Bratton said. Police didn't specify the penalties but said they'd be tougher than for a citation.

As to how that decision would be made, de Blasio said, "An officer ultimately has to make the judgment on the scene."

If police find somebody smoking marijuana -- as opposed to simply possessing it -- the suspect would have to go through the entire arrest procedure, Bratton said. People without proper identification or people with outstanding warrants would be taken into custody, he said.

De Blasio said misdemeanor marijuana arrests disproportionately affect young people in minority groups in New York City. He said many job applications ask about arrests or convictions, but not summonses.

"We don't want to saddle someone who made one small mistake with something that will follow them all their lives," the mayor said.

'You will see fewer unnecessary arrests'

De Blasio said the policy change will also free up New York City police to concentrate on more serious crimes. The officers won't have to spend hours at the station house or in court because of small amounts of marijuana.

"You will see fewer unnecessary arrests," he said, noting that misdemeanor marijuana arrests have declined for several years.

Voters in Colorado, Washington state, Oregon, Alaska and Washington, D.C., have voted to legalize recreational marijuana.

New York law still bans possession of the drug. The policy shift only changes how police would enforce the existing law.

De Blassio and Bratton said they do not support legalizing recreational marijuana.

The policy change was first reported Sunday by the New York Times.

CNN's Shimon Prokupecz and Mike Pearson contributed to this report.