Decriminalizes marijuana and hemp use, possession, cultivation, transportation, or distribution. Requires case-by-case review for persons currently charged with or convicted of nonviolent marijuana offenses, for possible sentence modification, amnesty, or immediate release from prison, jail, parole, or probation. Requires case-by-case review of applications to have records of these charges and convictions erased. Requires Legislature to adopt laws to license and tax commercial marijuana sales. Allows doctors to approve or recommend marijuana for patients, regardless of age. Limits testing for marijuana for employment or insurance purposes. Bars state or local aid to enforcement of federal marijuana laws. Summary of estimate by Legislative A...