Cal. Rev. & Tax. Code § 254.5
(a) Claims for the welfare exemption and the veterans’ organization exemption shall be filed on or before February 15 of each year with the assessor.
The assessor may not approve a property tax exemption claim until the claimant has been issued a valid organizational clearance certificate pursuant to Section 254.6. Financial statements shall be submitted only if requested in writing by the assessor.
(b)
(1) The assessor shall review all claims for the welfare exemption to ascertain whether the property on which the exemption is claimed meets the requirements of Section 214. The assessor shall also review all claims for the veterans’ organization exemption to ascertain whether the property on which the exemption is claimed meets the requirements of Section 215.1. In this connection, the assessor shall consider, among other matters, whether:
(c)
(2) If the assessor finds that the claimant’s property is ineligible for the welfare exemption or the veterans’ organization exemption, the assessor shall notify the claimant in writing of all of the following:
(d) Notwithstanding subdivision (a), an applicant, granted a welfare exemption and owning any property exempted pursuant to Section 214.15 or Section 231, shall not be required to reapply for the welfare exemption in any subsequent year in which there has been no transfer of, or other change in title to, the exempted property and the property is used exclusively by a governmental entity or by a nonprofit corporation described in Section 214.15 for its interest and benefit. The applicant shall notify the assessor on or before February 15 if, on or before the preceding lien date, the applicant became ineligible for the welfare exemption or if, on or before that lien date, the property was no longer owned by the applicant or otherwise failed to meet all requirements for the welfare exemption.
Prior to the lien date, the assessor shall annually mail a notice to every applicant relieved of the requirement of filing an annual application by this subdivision.
The notice shall be in a form and contain that information that the board may prescribe, after consultation with the California Assessors’ Association, and shall set forth the circumstances under which the property may no longer be eligible for exemption, and advise the applicant of the duty to inform the assessor if the property is no longer eligible for exemption.
The notice shall inform any applicant desiring to maintain eligibility for the welfare exemption under Section 214.15 or Section 231 for the next fiscal year of the procedure to reaffirm exemption eligibility. The failure to reaffirm eligibility for the exemption does not of itself constitute a waiver of exemption as called for by the California Constitution, but may result in additional contact by the assessor to verify exempt activity.