Cal. RTC § 23774

(a) Except as provided in subdivision (b), every organization exempt from filing an annual information return by reason of subdivision (a) of Section 23772, may be required to file an annual statement on or before the 15th day of the fifth calendar month following the close of the taxable year setting forth in the manner as may be required by the Franchise Tax Board the following information: the name and address of the organization, its major activities, its sources of income, and the section of the Internal Revenue Code under which it is exempt. Organizations other than those described in clause (i) and (iii) of subparagraph (A) of paragraph (2) of subdivision (a) of Section 23772 may also be required by the Franchise Tax Board to furnish information with respect to their gross receipts and their assets.

(b) Every religious organization exempt from filing an annual information return by reason of subdivision (a) of Section 23772, which because of sincerely held religious convictions refuses to file an annual statement as prescribed in subdivision (a), may submit in lieu thereof a notarized statement on its organizational letterhead containing the following information: the name and address of the organization, its major activities, its sources of income, and the section of the Internal Revenue Code under which it is exempt. That information shall be for the sole purpose of verifying the absence of unrelated business income of the organization. The statement shall be submitted on or before the 15th day of the fifth calendar month following the close of the taxable year.