California Code, Government Code - GOV § 51084

(1) That the land is essentially unimproved and if retained in its natural state has either scenic value to the public, or is valuable as a watershed or as a wildlife preserve, and the instrument contains appropriate covenants to that end.

(2) It is in the public interest that the land be retained as open space because such land either will add to the amenities of living in neighboring urbanized areas or will help preserve the rural character of the area in which the land is located.

(3) The land lies in an area that in the public interest should remain rural in character and the retention of the land as open space will preserve the rural character of the area.

(4) It is in the public interest that the land remain in its natural state, including the trees and other natural growth, as a means of preventing floods or because of its value as watershed.

(5) The land lies within an established scenic highway corridor.

(6) The land is valuable to the public as a wildlife preserve or sanctuary and the instrument contains appropriate covenants to that end.

(7) The public interest will otherwise be served in a manner recited in the resolution and consistent with the purposes of this subdivision and Section 8 of Article XIII of the Constitution of the State of California.

The resolution of the governing body shall establish a conclusive presumption that the conditions set forth in subdivisions (a) and (b) have been satisfied.