California Code, Business and Professions Code - BPC § 2525.5

(a) A person shall not distribute any form of advertising for physician recommendations for medical cannabis in California unless the advertisement bears the following notice to consumers:

NOTICE TO CONSUMERS: The Compassionate Use Act of 1996 ensures that seriously ill Californians have the right to obtain and use cannabis for medical purposes where medical use is deemed appropriate and has been recommended by a physician who has determined that the person's health would benefit from the use of medical cannabis. Recommendations must come from an attending physician as defined in Section 11362.7 of the Health and Safety Code. Cannabis is a Schedule I drug according to the federal Controlled Substances Act. Activity related to cannabis use is subject to federal prosecution, regardless of the protections provided by state law.

(b) Advertising for attending physician recommendations for medical cannabis shall meet all of the requirements in Section 651. Price advertising shall not be fraudulent, deceitful, or misleading, including statements or advertisements of bait, discounts, premiums, gifts, or statements of a similar nature.