Cal. Health and Safety Code § 17010

(a) “Temporary employee housing,” as used in this part, means a labor camp which is not operated on the same site annually and which is established for one operation and is then removed. (b) “Seasonal employee housing,” as used in this part, means any camp which is operated annually on the same site and which is occupied for not more than 180 days in any calendar year. (c) “Permanent employee housing,” as used in this part, means any labor camp which is not temporary or seasonal. (d) “Permanent single-family employee housing,” as used in this part, means single-family detached dwellings, mobilehomes, as defined in Section 18008, manufactured homes, as defined in Section 18007, or factory-built housing, as defined in Section 19971, constructed and maintained in accordance with applicable state or federal laws, including required permits and inspections. Each dwelling shall be inhabited by only one family, which includes at least one permanent year-round employee. “Permanent single-family employee housing” does not include housing accommodations or property, as defined in subparagraph (D) of paragraph (1) of subdivision (b) of Section 17008.