From Governor Brown
"Intent Language
The Medical Marijuana Regulation and Safety Act enacted in 2015 created a regulatory framework for the licensing and enforcement of the cultivation, manufacture, transportation, storage, and distribution of medical cannabis in California. Proposition 64, the Adult Use of Marijuana Act, made the recreational use of cannabis legal to people over the age of 21. The effective date for both measures is January 1, 2018.
It is the intent of the Governor’s Budget that this language once drafted will move the State forward with the regulation of both medical cannabis and adult use cannabis. The State will need one regulatory structure of cannabis activities across California. Implementing the current medical and adult use cannabis statutes separately will result in duplicative costs. Additionally, a separate regulatory framework for each would lead to confusion among licensees and regulatory agencies, undermining consumer protection and public safety."
http://www.dof.ca.gov/Budget/Trailer_Bill_Language/documents/200CannabisRegulationDraft.pdf
http://www.sacbee.com/news/politics-government/capitol-alert/article142930289.html