CA Pub Res Code Section 6303.1

Any person who knowingly and willfully fills, dredges, or reclaims any state-owned land under the jurisdiction of the commission underlying any navigable waters, or who erects, maintains, removes, or alters any structure on such land, without written authorization from the commission is guilty of a misdemeanor.

Nothing in this section shall be construed to prevent public agencies from performing emergency alteration, maintenance, repair, or removal of flood control works or structures on state-owned lands underlying navigable waters.