Cal. INS § 1370.4

An exchange admitted prior to October 1, 1961, shall be exempt from the provisions of Section 1370.2 until it replaces its attorney in fact, except when the replacement is in strict compliance with a contract between the exchange and its current attorney in fact entered into prior to October 1, 1961, or the effective legal control of its attorney in fact passes, by means other than by way of judicial process (including but not limited to: probate proceedings, bankruptcy proceedings or an action by a dissident minority interest to force a sale or partition of the attorney in fact) to persons none of whom had a proprietary interest therein on October 1, 1961, subject to the further provisions of this section and to the provisions of Section 1370.8.

While exempted from the provisions of Section 1370.2 as modified by Section 1370.8, such an exchange shall be subject to and comply with the surplus requirements provided in this chapter (commencing with Section 1280) immediately prior to October 1, 1961.

The exemption from Section 1370.2 provided by this section shall be progressively abolished so that on and after the dates specified in the left-hand column of the following table every exchange shall be required to maintain at least a minimum surplus equal to that percentage of the minimum paid-in capital required by this code of capital stock insurers transacting the same classes of insurance which is set forth in the right-hand column of the following table.

January 1, 1967 20%
January 1, 1970 40%
January 1, 1973 70%
January 1, 1976 100%

In a case where the provisions of Section 1370.8 become applicable any additional minimum surplus required by that section shall be in addition to any required under the provisions of this paragraph.