(56)In order to facilitate cross-border merger operations, it should be specified that, unless this Directive provides otherwise, each company taking part in a cross-border merger, and each third party concerned, remains subject to the provisions and formalities of the national law which would be applicable in the case of a national merger. None of the provisions and formalities of national law, to which reference is made in this Directive, should introduce restrictions on freedom of establishment or on the free movement of capital, save where these can be justified in accordance with the case-law of the Court of Justice of the European Union and in particular, by requirements of the general interest and are both necessary for, and proportionate to, the attainment of such overriding requirements.