“California should immediately begin work to set up regulated treatment guidelines - replete with dosing information, therapeutic guidelines, rules to prevent against exploitation during guided treatments, and medical clearance of no underlying psychoses," Newsom's statement said. “Unfortunately, this bill would decriminalize possession prior to these guidelines going into place, and I cannot sign it.”

To the extent that we don't have those things, it's because of prohibition. Every study I've read (I'm especially interested in the migraine prevention aspects) has a paragraph or two bemoaning how little research they've been allowed to do.