(b) An existing domestic mutual holding company may, with the approval of the commissioner: (i) acquire direct or indirect ownership of a converting foreign mutual insurer that becomes a stock insurer in compliance with the law of its state of domicile;(ii) grant membership interests and equity rights to the members or policyholders of a foreign mutual insurer that merges with a direct or indirect domestic or foreign subsidiary of the domestic mutual holding company and such a subsidiary, if it is a domestic insurer, may merge with such a foreign mutual insurer pursuant to section 19A or 19B notwithstanding the provisions in said sections to the effect that they do not authorize mergers between mutual insurers and stock insurers. The commissioner may consider the fairness of the terms and conditions of the transaction, whether the interests of the members of each domestic mutual holding company that is a party to the transaction are protected, and whether the proposed transaction is in the public interest.