CA Pub Res Code Section 29766

Nothing in this division shall deny the right of private or public property owners and local governments to establish agriculture preserves and enter into contracts pursuant to the California Land Conservation Act of 1965 (Chapter 7 (commencing with Section 51200) of Part 1 of Division 1 of Title 5 of the Government Code) or apply other enforceable restrictions or zoning within the primary zone or the secondary zone.