Proponens of a marijuana legalization initiative in California say they have collected enough signatures for the measure to qualify for the ballot in November.

Some of the names behind the initiative are Ex-Facebook President Sean Parker and Lt. Gov. Gavin Newsom. They say they have collected 600,000 signatures, more than the 365,000 needed to put marijuana legalization on the ballot.

Newsom is a Democratic candidate for governor in 2018 and he, along with other supporters of the Adult Use of Marijuana Act are going to launch the official campaign Wednesday in San Francisco.

The measure would legalize possession of 1 ounce of marijuana and cultivation of six plants for those aged 21 or over.