Oregon’s 2020 drug decriminalization law expired Sunday, ending the first-in-the-nation experiment that made possession of small amounts of hard drugs punishable by a ticket and maximum $100 fine.

As of Sunday, possession of personal-use quantities of illicit drugs will be a misdemeanor, punishable by up to six months in prison.

The new law, passed in March, recriminalizes drug use and makes it easier for police to combat public drug use, introducing harsher penalties for those selling drugs in parks.

The new law also overhauls the 2020 ballot measure, which 58 percent of Oregon voters approved in November 2020, as a novel approach to dealing with issues in the criminal justice system, while trying to get drug addicts the treatment they needed.

Supporters of the decriminalization law argued prison was not an effective way of curbing drug abuse and called for treatment as a response instead.