California Code, Public Resources Code - PRC § 5097.9

No public agency, and no private party using or occupying public property, or operating on public property, under a public license, permit, grant, lease, or contract made on or after July 1, 1977, shall in any manner whatsoever interfere with the free expression or exercise of Native American religion as provided in the United States Constitution and the California Constitution;  nor shall any such agency or party cause severe or irreparable damage to any Native American sanctified cemetery, place of worship, religious or ceremonial site, or sacred shrine located on public property, except on a clear and convincing showing that the public interest and necessity so require.  The provisions of this chapter shall be enforced by the commission, pursuant to Sections 5097.94 and 5097.97.

The provisions of this chapter shall not be construed to limit the requirements of the Environmental Quality Act of 1970, Division 13 (commencing with Section 21000).

The public property of all cities, counties, and city and county located within the limits of the city, county, and city and county, except for all parklands in excess of 100 acres, shall be exempt from the provisions of this chapter.  Nothing in this section shall, however, nullify protections for Indian cemeteries under other statutes.