(1) The articles of incorporation of a stock insurer shall provide for authorized capital in an amount not less than that required under this code.
(2) In the sale of the insurer’s capital stock, an amount not less than the minimum paid-in capital stock required under this code shall be paid in with money of the United States or in equivalent United States Government securities. Any additional sums paid for stock or any stock sold after the minimum required capital has been so paid in in money may be in the form of any type of securities in which the insurer is authorized to invest its funds under part II of chapter 625.