Public Resources Code § 4712
ARTICLE 5. Forest Insect and Plant Disease Control
As used in this article:
(a) “Owner” includes any individual, partnership, corporation, or association.
(b) “Timberland” means any land which has enough timber, standing or down, to constitute, in the judgment of the board, an insect or pine beetle infestation breeding ground or plant disease hazard of a nature to constitute a menace, injurious and dangerous to timber or forest growth.