Cal. Code Regs. tit. 14 § 10921
Failure to put any land, water, or structure to the use for which the Commission issued a claim of exemption for a period of two (2) years shall create a presumption that the structure or the use of the land, water, or structure has been abandoned, so that the exemption no longer applies to the abandoned structure or use, provided that the Commission may determine an exemption has not been abandoned despite the non-use of any land, water, or structure for a period of two (2) years if it resolves that it was physically or legally impossible to make such use of the land, water, or structure within the two (2) year period or that the holder of the exemption had made reasonable and good-faith efforts to put the land, water, or structure to such exempted use during the period of non-use.
Cal. Code Regs. Tit. 14, § 10921
Note: Authority cited: Section 66632(f), Government Code; and Section 29507, Public Resources Code. Reference: Sections 66632.1, 66655 and 66656, Government Code; Section 29507, Public Resources Code; Avco Community Developers, Inc. v. South Coast Regional Commission (1976) 17 Cal.3d 785, 798; Hill v. City of Manhattan Beach (1971) 6 Cal.3d 279, 286; and Gerhard v. Stephens (1968) 68 Cal.2d 864.