Can anyone over 21 and over walk into a dispensary and purchase cannabis?

No. Dispensaries will only be licensed to sell medical cannabis, and will be prohibited from selling non-medical cannabis to individuals without a doctor’s recommendation. The initiative calls for licensing authorities to begin accepting applications and issuing licenses in January 2018, at which point any adult 21 and over may purchase non-medical cannabis. The Bureau of Marijuana Control is responsible for licensing dispensaries under the initiative.