(1) The taxation authorities of the contracting States shall exchange such information (being information which is available under their respective taxation laws in the normal course of administration) as is necessary for carrying out the provisions of the present Convention or for the prevention of fraud or for the administration of statutory provisions in relation to the taxes which are the subject of the present Convention. Any information so exchanged shall be treated as secret and shall not be disclosed to any persons other than those concerned with the assessment and collection of the taxes which are the subject of the present Convention. No information shall be exchanged which would disclose any trade, business, industrial or professional secret or trade process. (2) The taxation authorities of the contracting States may consult together, as may be necessary, for the purpose of carrying out the provisions of the present Convention and in particular the provisions of Articles III and IV. Where a taxpayer claims that he has been or may be subjected to double taxation contrary to the provisions of the present Convention, he may present the facts to the taxation authorities of either contracting State. Should the taxpayer's claim be deemed worthy of consideration, the taxation authorities shall endeavor to come to an agreement with a view to avoidance of the double taxation in question. (3) The taxation authorities of both contracting States may prescribe regulations necessary to interpret and carry out the provisions of the present Convention and may communicate with each other directly for the purpose of giving effect to the provisions of the present Convention. (4) The provisions of the present Convention shall not be construed to restrict in any manner any exemption, deduction, credit or other allowance now or hereafter accorded by the laws of either contracting State in determining the tax of such State.