Water Code § 12735
ARTICLE 3. Projects in Other Watersheds
The Marin County Flood Control and Water Conservation District shall give assurances satisfactory to the Secretary of the Army that the local cooperation, required by the act of Congress approved October 23, 1962 (Public Law 87-874, 76 Stat. 1173), will be furnished by the district in connection with the plan of flood control adopted and authorized by Section 12734.