The Adult use of Marijuana Act is an initiative for the legalization of marijuana legalization that is being proposed for the November, 2016 California ballot.
Per the summary here it would allow adults of age 21 or over to possess, use, and grow small quantities of marijuana.
According to this summary the act currently polls at a majority of support, and per this report has submitted enough signatures to be on the ballot.
Will the AUMA be on the ballot in the November 2016 California election, and pass?
Resolution is not dependent on any subsequent legislation or legal challenges around this issue.