The Flag of the United States and the Flag of the State shall be prominently displayed during business hours upon or in front of the buildings or grounds of or at each of the following places:
(a) Each public building belonging to the State, a county, or a municipality.
(b) At the entrance and exit of every state park.
(c) At the entrance or upon the grounds of each campus of the University of California.
(d) At the entrance or upon the grounds or upon the administration building of every university, college, high school, and elementary school, both public and private, within the State.
(e) Upon or at every agricultural inspection station just inside California and located on every highway leading into California.
(f) At the entrance of or within every state highway maintenance station where personnel reside or are on duty at the time necessary to raise and lower the Flag.