California Code, Insurance Code - INS § 1311

A reciprocal or interinsurance exchange may engage in the surety insurance business in this state only provided its surplus is at least twice the amount required as paid-in capital of an incorporated insurer writing the same classes of insurance by the provisions of Section 700.01.  Paid-in capital as used in this section shall not include any of the surplus amounts required of incorporated insurers by the provisions of Sections 700.02, 700.03 and 700.05 of this code.

Any such reciprocal or interinsurance exchange shall be subject to such of the provisions of Chapter 1, except Sections 12050, 12051, and 12052, Part 4, Division 2, as can be made applicable to the nature of a reciprocal or interinsurance exchange.