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of this Agreement shall not prevent the two countries from entering into special arrangements with respect to the trade between them, pending the establishment of their mutual trade relations on a definitive basis. "12. Each contracting party shall take such reasonable measures as may be available to it to ensure observance of the provisions of this Agreement by the regional and local Governments and authorities within its territory." " 11. The Interpretative Notes to Article XXIV in Annex I of the General Agreement on Tariffs and Trade shall read as follows : " ad Article XXIV " Paragraph 5 " It is understood that the provisions of Article I would require that, when a product which has been imported into the territory of a member of a Customs union or free-trade area at a preferential rate of duty is re-exported to the territory of another member of such union or area, the latter member should collect a duty equal to the difference between the duty already paid and the most-favoured-nation rate. "Paragraph 11 " Measures adopted by India and Pakistan in order to carry out definitive trade arrangements between them, once they have been agreed upon, might depart from particular provisions of this Agreement, but these measures would in general be consistent with the objectives of the Agreement." Considering that, in accordance with Article XXX of the General Agreement on Tariffs and Trade, the aforesaid amendment will become effective, in respect of those contracting parties which accept it, upon acceptance by two-thirds of the contracting parties, Agree to deposit before June 1, 1948, their instruments of acceptance of the aforesaid amendment with the Secretary-General of the United Nations. The original of this Protocol shall be deposited with the SecretaryGeneral of the United Nations, who is authorized to effect registration thereof. In witness whereof the respective representatives, duly authorized, have signed the present Protocol.