Litter receptacles shall be placed in all public places in the state, including, but not limited to, the following:
The board may further define "public place" by specifying in its regulations particular types of places that are subject to the requirements of this section.
Litter receptacles need be placed in such public places only during times such places, or events held at them, are open to the public.
Ca. Gov. Code § 68055.2