62 STAT.] MULTILATERAL-UNIVERSAL POSTAL UNION-JULY 5, 1947 (a) The listing of domestic and international lines which are at the disposal of other Administrations for the conveyance of air-mail articles in closed or open mails (number and route, length in kilometers, the average distance based on Article 14, Section 4 for the domestic lines, class A or B services, company, etc.); (b) Transportation charges per kilogram due from the Administra- tions making use of such lines; (c) Air surcharges collected by each Administration for the various classes of air-mail correspondence and for the various countries; (d) The decisions of each Administration relative to the option whether or not certain of the Air Mail Provisions should be applied. 2. The International Bureau publishes once a year, in June, a general list of information concerning the air-mail services from the facts thus collected, which is distributed among the Administra- tions. Any modifications to be made in the information furnished or in the general list shall be communicated to the International Bureau by air mail without delay. 3. The International Bureau is also charged with the preparation and distribution of maps showing the lines of domestic and inter- national air-mail communications of all countries, as well as a list showing the schedules of each country's domestic and international air lines and the deadline by which the planes should arrive at the airports to permit mail to be delivered that day. 4. Any modifications in the publications mentioned in Sections 2 and 3 are communicated to the Administrations by means of Supple- ments. 5. Regardless of the foregoing, the Administrations may agree to advise each other directly, in advance of each schedule period, as to the facts and schedules concerning the air lines which particularly interest them, as provisional information. 6. Administrations which utilize air-mail communications for the transportation of their own ordinary mails shall so inform the other Administrations of the Union through the intermediary of the Inter- national Bureau, advising them at the same time of the effective date when use of such communications is inaugurated, the connections thus made available, as well as all changes made therein. 3409 Ante, p. 3407 . General informa- tion list. Maps. Supplements. Schedules, etc. CHAPTER V. Accounting. Settlement of Accounts. ARTICLE 17. Accounting statistics. 1. Unless exception is made due to circumstances, the general Method, etc. accounting for air-transportation charges is effected in accordance with statistical tables prepared during the seven days following the 14th of May and the 14th of November of each year. The results of the May statistics form the basis for the payments due for the months from May to October; those of November are used for the months from November to April.
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