Under such limitations and restrictions as are prescribed by law, and in addition to jurisdiction and powers otherwise conferred, boards of supervisors in their respective counties shall have jurisdiction and power to construct within the incorporated as well as the unincorporated area of the county works for the prevention of beach erosion or for the restoration of eroded beaches or both. Such work may be performed along any portion of the ocean front regardless of ownership of the adjacent upland. Before any such work is performed by a county within the incorporated area of any county, the consent of the governing body of such incorporated area shall first be obtained.
Source:
Section 5157.5, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=PRC§ionNum=5157.5..