PALO ALTO, Calif. -

Stanford University officials say hard liquor is now prohibited in undergraduate on-campus parties.
   
President John L. Hennessy and Provost John Etchemendy announced the new student alcohol policy in a letter sent Monday to all new and returning undergraduates.
   
The change comes after former Stanford swimmer Brock Turner was convicted of sexually assaulting a woman, after both drank at a campus party. The case caused a national furor when a judge sentenced Turner to just six months in jail.
   
Hennessy and Etchemendy say the new policy is part of an effort "to build a healthier campus culture around alcohol."
   
According to the new policy, only beer and wine will be allowed at on-campus undergraduate student parties.
   
Hard alcohol use will be allowed at parties hosted by graduate students and only in the form of mixed drinks.