Cal. Business and Professions Code § 25608.10

(a) On the portion of the Truckee River, from the outfall of Lake Tahoe upstream of the Highway 89 Bridge in Tahoe City to the Alpine Meadows Bridge, a person in a vessel, as defined by Section 651 of the Harbors and Navigation Code, or a bather, as defined by Section 651.1 of the Harbors and Navigation Code, shall not possess a container with an alcoholic beverage, whether opened or closed, during the summer holiday periods that the Placer County Board of Supervisors prohibits the consumption of an alcoholic beverage or possession of an open alcoholic beverage container on the land portions along this portion of the river. (b) For purposes of this section, “container” means a bottle, can, or other receptacle. (c) A violation of this section is punishable as an infraction pursuant to subdivision (b) of Section 25132 of the Government Code. (d) Placer County shall provide notice on the land portions along the Truckee River described in subdivision (a) that a violation of this section is punishable as an infraction.