3412 INTERNATIONAL AGREEMENTS OTHER THAN TREATIES [62 STAT. duplicate to the dispatching exchange offices for acceptance. The offices, after accepting the statements, send them in turn to their central Administration, which forwards a copy to the central Admin- istration of the creditor country. ceptremptn of a 4. If the creditor Administration has not received any statement of differences within an interval of two months, counting from the date of transmittal, the statements are considered as automatically ac- cepted. In relations between distant countries, the period is extended to three months. ARTICLE 22. Air-transportationaccount. Basis for accounts. 1. The gross weights of the dispatches, and the net weights increased by 10 per cent of the articles in open mail, shown in the statements A V 3 or A V 4, are multiplied by a figure determined by the frequency of the summer and winter services; the products thus obtained serve as the basis for individual accounts prepared on a form in accordance Ae, pw ith Form A V 5 hereto appended and showing, in francs, the trans- portation charges due to each Administration for the current six- month period. Preparation and transmission. n 2. The duty of preparing the accounts is incumbent upon the creditor Administration, which transmits them to the debtor Admin- istration. Presumption of ac- cepta on ac 3. The individual accounts are made up in duplicate and transmitted as soon as possible to the debtor Administration. If the creditor Administration has not received any statement of differences within an interval of two months, counting from the date of transmittal, such accounts are considered as automatically accepted. In relations between distant countries, this period is extended to three months. ARTICLE 23. General account. In the absence of contrary agreement between the Administrations concerned, the general account of air-transportation charges is pre- pared twice a year by the International Bureau, in accordance with the rules fixed for the transit-charge account. CHAPTER VI. Miscellaneous Provisions. ARTICLE 24. Designation of air-mail correspondence. Surcharged air-mail correspondence is provided, at the time of mailing, with a special blue label or imprint bearing the words Par avion (by air mail), with an optional translation into the language of the country of origin.
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