3398 ents.odica state- 2. Service operations which give rise to recording form the subject of periodical statements based on the actual records. countingofarticles. 3. For all other operations, a count is made each year of articles of all kinds, without distinction between letters, post cards, commercial papers, prints, samples of merchandise, and small packets; and, at least once every three years, a count is made of the different classes of correspondence. Each Administration itself fixes the time and duration of such counts. atermediate esti- 4. In the interval which elapses between special statistics, the num- bers of the different classes are estimated in accordance with propor- tional figures taken from the preceding special statistics. Questionnaires. 5. The International Bureau prepares and distributes the statistical questionnaires to be filled in by each Administration. It furnishes, to Administrations which so request, all necessary information con- cerning the rules to be followed in order to assure uniformity in statis- tical operations. Limitation. Supervision. Repayments. Classification of countries. ARTICLE 183. Expenses of the InternationalBureau. 1. The ordinary expenses of the International Bureau shall not exceed the sum of 500,000 francs a year. 2. The Swiss Postal Administration supervises the expenses of the International Bureau, makes the necessary advances, and makes up the annual account which is communicated to the other Administrations. 3. The sums advanced by the Swiss Postal Administration in accord- ance with Section 2 shall be repaid by the debtor Administrations as soon as possible, and at the latest before the 31st of December of the year in which the account is sent out. After that period, the sums due bear interest, payable to the said Administration, at the rate of 5 per cent a year, counting from the date of expiration of the said period. 4. The countries of the Union are classified as follows, in view of the distribution of the expenses: INTERNATIONAL AGREEMENTS OTHER THAN TREATIES [62 STAT. before the beginning of the year to which they relate, the International Bureau publishes: (a) Every three years: (1) A "Complete Postal Service Statistics" consisting of five parts: I. General; II. Organization of the Postal Service; III. Traffic; IV. Undeliverable Correspondence; and V. Fi- nancial Statement; (2) A "Statistics of Dispatches in the International Postal Service"; (b) Every intermediate year, when the publications mentioned under (a) do not appear: An "Abridged Postal Statistics," dealing only with Part III. Traffic, and Part V. Financial Statement. n I
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