(20)Whereas the Member States must be able to ensure that the insurance products and contract documents used, under the right of establishment or the freedom to provide services, to cover risks situated within their territories comply with such specific legal provisions protecting the general good as are applicable; whereas the systems of supervision to be employed must meet the requirements of an integrated market but their employment may not constitute a prior condition for carrying on insurance business; whereas from this standpoint systems for the prior approval of policy conditions do not appear to be justified; whereas it is therefore necessary to provide for other systems better suited to the requirements of an internal market which enable every Member State to guarantee policyholders adequate protection;