The superintendent shall not issue or continue a certificate of authority as to a Lloyds Plan underwriters under this article unless it has initially and thereafter maintained a surplus, over all liabilities, of admitted assets in amount of not less than fifty thousand dollars ($50,000). The initial such surplus as contributed to the attorney- in-fact shall consist of cash or of securities approved by the superintendent, and shall include the amount of cash, securities, or surety bond deposited pursuant to Section 647 [59A-38-4 N.M. Stat. Ann.] of this article.