California Code of Regulations
Title 18 - Public Revenues
Division 1 - State Board of Equalization-Property Tax (California Department of Tax and Fee Administration - Timber Yield Tax, See Chapter 11)
Chapter 2 - Assessment
Article 5 - Situs
Section 205 - Movable Property

(a) General. Movable property is all property which is intended to be, and is, moved from time to time from one location to another. Such property may be in-transit, consigned, or leased, and under such circumstances its situs is to be determined by reference to Section 203 or 204 of this chapter.

Movable property has situs where located on the lien date if it has been in the county for more than 6 of the 12 months immediately preceding the lien date and if it is to remain in or be returned to the county for any substantial period during the 12 months immediately succeeding the lien date. Property which has been in the county for less than 6 of the 12 months immediately preceding the lien date, but which is committed to use in the county for an indeterminate period or for more than six months, has situs there whether the use extends through or commences with the lien date.

Property which does not have situs where located on the lien date pursuant to the previous paragraph has situs at the location where it is normally returned between uses or, if there is no such location, at the principal place of business of the owner.

(b) General Aircraft. Aircraft other than those subject to Revenue and Taxation Code sections 1150 and 1155 have situs for taxation purposes at the airport in which they are habitually situated when not in flight. An aircraft that spends a substantial amount of ground time at each of two or more airports has its tax situs at the airport where it spends the greatest amount of ground time.

(c) This section does not apply to boats or racehorses.