Section 174H. Sections one hundred and seventy-four F to one hundred and seventy-four K, inclusive, shall apply to insurers as defined in section one hundred and seventy-four G either domiciled in the commonwealth or domiciled in a state other than an accredited state which has in effect a substantially similar law. All provisions of sections two hundred and six to two hundred and six D, inclusive, to the extent they are not superseded by sections one hundred and seventy-four I to one hundred and seventy-four K, inclusive, shall continue to apply to all parties within holding company systems subject to sections one hundred and seventy-four F to one hundred and seventy-four K, inclusive.