CA Rev & Tax Code Section 401.16

If, for purposes of property taxation, the county assessor utilizes the reproduction or replacement cost approach to value to determine the value of tangible personal property or trade fixtures, both of the following apply:

(a)

(1)If the county assessor depreciates this property using percent good factors published by the State Board of Equalization that provide separate factors for property that is first acquired new and property that is first acquired used, the assessor may not average the published factors to apply these factors to both classes of new and used property.

(2)

Notwithstanding paragraph (1), if information reported by a taxpayer does not indicate whether this property was first acquired by the taxpayer new or used, the assessor may average the published factors.

(b)

If the county assessor depreciates this property using percent good factors that include a minimum percent good, the minimum percent good factors shall be determined in a manner that is supportable.