(a) to apply the relevant provision of their tax law which distinguish between tax-payers who are not in the same situation with regard to their place of residence or with regard to the place where their capital is invested; (b) to take all requisite measures to prevent infringement of national law and regulations, in particular in the field taxation and the prudential supervision of financial institutions, or to lay down procedures for the declaration of capital movements for purposes of administrative or statistical information, or to take measures which are justified on grounds of public policy or public security. 2. The provisions of this Chapter shall be without prejudice to the applicability of restrictions on the right of establishment which are compatible with this Treaty. 3. The measures and procedures referred to in paragraphs 1 and 2 shall not constitute a means of arbitrary discrimination or a disguised restriction on the free movement of capital and payments as defined in Article 73b. ARTICLE 73e By way of derogation from Article 73b, Member States which, on 31 December 1993, enjoy a derogation on the basis of existing Community law, shall be entitled to maintain, until 31 December 1995 at the latest, restrictions on movement of capital authorized by such derogations as exist on that date. ARTICLE 73f Where, in exceptional circumstances, movement of capital to or from third countries cause, or threaten to cause, serious difficulties for the operation of economic and monetary union, the Council, acting by a qualified majority on a proposal from the Commission and after consulting the ECB, may take safeguard measures with regard to third countries for a period not exceeding six months if such measures are strictly necessary. ARTICLE 73g 1. If, in the cases envisaged in Article 228a, action by the Community is deemed necessary, the Council may, in accordance with the procedure provided for in Article 228a, take the necessary urgent measures on the movement of capital and on payments as regards the third countries concerned. 2. Without prejudice to Article 224 and as long as the Council has not taken measures pursuant to paragraph 1, a Member State may, for serious political reasons and on grounds of urgency, take unilateral measures against a third country with regard to capital movements and payments. The Commission and the other Member States shall be informed of such measures by the date of their entry into force at the latest. The Council may, acting by a qualified majority on a proposal from the Commission, decide that the Member State concerned shall amend or abolish such measures. The President of the Council shall inform the European Parliament of any such decision taken by the Council. ARTICLE 73h Until 1 January 1994, the following provisions shall be applicable: 1) Each Member State undertakes to authorize, in the currency of the Member State in which the creditor or the beneficiary resides, any