CA Gov't Code Section 51090

An open-space easement for a term of years may be terminated only in accordance with the provisions of this article. An open-space easement may be terminated only by:

(a)

Nonrenewal, or

(b)

Abandonment. Abandonment of an easement granted to the county or city pursuant to this chapter shall be controlled by Section 51093. Abandonment or nonrenewal of an easement granted to a nonprofit organization pursuant to this chapter shall be effective only if approved by appropriate resolution of the governing body of such organization and such abandonment or nonrenewal initiated by a nonprofit organization has been approved by the county or city in which the land lies in the manner provided in Section 51093.