CA Rev & Tax Code § 217.1 (2021)
2021 California Code|Revenue and Taxation Code - RTC|DIVISION 1 - PROPERTY TAXATION|PART 2 - ASSESSMENT|CHAPTER 1 - Taxation Base|ARTICLE 1 - Taxable and Exempt Property|Section 217.1.

217.1.  (a) Except as provided in subdivision (d), the following articles of personal property that are made available for display in a publicly owned aerospace museum, or an aerospace museum that is regularly open to the public and that is operated by a nonprofit organization that qualifies for exemption pursuant to Section 23701d, shall be exempt from taxation:(1) Aircraft that have been restored or maintained, whether currently certified or not for flight purposes.(2) Aircraft donated in perpetuity to the aerospace museum. (b) When making a claim for an exemption pursuant to this section, a person claiming the exemption shall give all information required and answer all questions in an affidavit, and shall subscribe and swear to the affidavit, under penalty of perjury. The assessor may require other proof of the facts stated before allowing the exemption. The affidavit shall be accompanied by a certificate of the director or other officer of the aerospace museum in which the property for which an exemption is claimed under this section was made available for display that the property was available for public display in the aerospace museum for the period specified in subdivision (e).(c) For the 1984–85 assessment year and each assessment year thereafter, the provisions of Sections 255 and 260 shall be applicable to the exemption provided by this section. (d) The exemption provided by subdivision (a) shall not apply to any aircraft loaned by any person who holds aircraft primarily for purposes of sale. (e) The exemption provided by this section shall not apply unless the property was made available for public display in the aerospace museum for a period of 90 days during the 12-month period immediately preceding the lien date for the year for which the exemption is claimed. If the property was first made available for public display less than 90 days prior to the lien date, the exemption may be granted if the person claiming the exemption certifies in writing that the property will be made available for public display for at least 90 days during the 12-month period commencing with the first day the property was made available for public display. (f) For purposes of this section, “regularly open to the public” means that the aerospace museum was open to the public not less than 20 hours per week for not less than 35 weeks of the 12-month period immediately preceding the lien date for the year for which the exemption is claimed. If the aerospace museum has been open for less than 35 weeks during the 12-month period immediately preceding the lien date or for less than 20 hours per week during that period, the exemption may be granted if the director or other officer of the aerospace museum certifies in writing that the aerospace museum will be open for not less than 20 hours per week for not less than 35 weeks during the 12-month period beginning with the date the aerospace museum was first opened. (g) If a person certifies in writing that the property will be made available and the aerospace museum open for the periods specified in subdivisions (e) and (f), and the property is not so made available or the aerospace museum is not so opened, the exemption shall be canceled, and an escape assessment may be made as provided in Section 531.1. (h) The exemption provided by this section shall be applicable for the 1979–80 fiscal year and each fiscal year thereafter.(Amended by Stats. 2004, Ch. 200, Sec. 3. Effective January 1, 2005.)