Cal. Unemployment Insurance Code § 805

An unregistered organization described in Section 608, and which has been determined by the Internal Revenue Service to be exempt under Section 501(a) as an organization described in Section 501(c)(3) of the Internal Revenue Code, may elect reimbursement financing under Section 801 when the director finds that it has good cause for failing to register as an employer under this division. The election under Section 801 shall be from the time the organization became an employer. The organization shall, upon election, be liable for reimbursement of the cost of benefits chargeable to the organization from the time it became an employer. Payment of the cost of benefits shall be as provided in Section 803 except that benefits paid more than 30 days prior to the date of election under Section 801 shall accrue interest as provided in Section 1113. The election under Section 801 shall be subject to all provisions of Section 803.