"The University of California prohibits the use, possession and sale of marijuana in any form on all university property, including university-owned and leased buildings, housing and parking lots.Marijuana is also not permitted at university events or while conducting university business
On Nov. 8, 2016, California voters passed Proposition 64 legalizing the use of recreational marijuana among people over the age of 21. It is important to understand that Prop. 64 does not change UC policy;marijuana remains prohibited on all university property and at all university events, except for approved academic research."
For more information, visit http://www.ucop.edu/marijuana-and-drug-policy/