(CNN)The prosecutor in Arizona's largest county is dropping all pending charges for recreational marijuana use by adults after Arizona voters legalized it in the November election.
"Instead of continuing to spend resources on these cases, this office will begin implementing the will of the voters immediately," the Maricopa County Attorney's Office said in a written statement Monday.
Proposition 207 passed last week with 60% of the vote.
In addition to decriminalizing most recreational use, it allows past marijuana convictions to be expunged.
Voters in four states approved legalizing marijuana for recreational use in last week's election, bringing the number of states that have approved it to 15.