3414 INTERNATIONAL AGREEMENTS OTHER THAN TREATIES [62 STAT. which employ several separate air services in succession, is effected through the intermediary of the Administration of the country where the transshipment takes place. The rule does not apply when the transfer is made between aircraft covering the successive sections of one and the same service. ARTICLE 29. Notations to be made on the letter bills, insured bills, and labels of air- mail dispatches. The letter bills and insured bills accompanying air-mail dispatches shall be provided, in their headings, with the Par avion label or the Ante, p. 3412. imprint mentioned in Article 24. The same label or imprint is affixed to the labels or addresses of such dispatches. The number of the dis- patches shall be shown on the labels or addresses of such dispatches. ARTICLE 30. Customs clearance of dutiable correspondence. The Administrations take steps to accelerate, as far as possible, the customs clearance of dutiable air-mail correspondence. ARTICLE 31. Return of empty air-mailsacks. 1. Air-mail sacks shall be returned empty to the Administration of origin by surface means. When there are as many as ten at least, special dispatches thereof shall be prepared between air-mail exchange Labels. offices designated for that purpose; such dispatches shall be labeled "Sacs vides" (Empty sacks) and numbered according to an annual series. The letter bill shows the number of sacks returned to the country of origin. Ante, p. 3379. 2. The provisions of Sections 5 and 6 of Article 151 of the Regula- tions of the Convention shall apply to empty air-mail sacks. ARTICLE 32. Application of the provisions of the Convention and Agreements. The provisions of the Convention and Agreements, as well as of their Regulations, with the exception of the Parcel Post Agreement and its Regulations, are applicable as regards everything which is not expressly regulated by the foregoing Articles. ARTICLE 33. Effective date and duration of the Provisions adopted. Ante, p . 3336. 1. The present Provisions will be put into force from the effective date of the Convention. 2. They will have the same duration as the Convention, unless they are renewed by mutual agreement between the parties concerned. Done at Paris, July 5, 1947. Signatures. [For signature, see French text, p. 3188; for romanization, see p. 3416.1
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