(b) In the case of approval pursuant to item (ii) of subsection (a) of this section, the superintendent may prescribe limitations for the protection of the interests of the policyholders of such company after taking into account the effect of such business on such company's existing insurance business and its surplus, the proposed allocation of the estimated cost of such business and the risks inherent in such business as well as the relative advantages to such company and its policyholders of conducting such business directly instead of through a subsidiary.