62 STAT.] MULTILATERAL-UNIVERSAL POSTAL UNION-JULY 5, 1947 of origin and the date of mailing. In localities having several post offices, the stamp shall indicate which is the office of mailing. 2. The application of the stamp contemplated in Section 1 is not obligatory for correspondence prepaid by means of impressions of stamping machines if the indication of the place of origin and date of mailing appears in such impressions. Neither is the application of the stamp in question required for unregistered articles at the reduced rate, on condition that the place of origin is indicated on such articles. 3. All valid postage stamps shall be canceled. 4. Unless the Administrations have prescribed cancellation by means of a special marking, postage stamps not canceled through error or oversight on the part of the service of origin shall be canceled with a heavy line by the office which detects the irregularity. In no case shall these stamps be marked with the date stamp. 5. Missent correspondence, except unregistered articles at reduced rate, shall be struck with the impression of the date stamp of the office at which it arrives through error. This obligation is imposed not only upon fixed post offices, but also upon traveling post offices as far as possible. The impression shall be placed on the back in the case of letters, and on the front in the case of post cards. 6. The postmarking of correspondence mailed on board ships is incumbent upon the postal agent or the officer on board in charge of the service, or in their absence upon the post office at the port of call where such correspondence is delivered in open mail. In such a case, the office marks the articles with its date stamp and places on them the note Navire (ship), Paquebot (mail steamer), or a similar notation. 7. The office of destination of a reply-paid post card may apply its date stamp on the left side of the front of the reply half. ARTICLE 133. Special-delivery articles. Articles to be specially delivered shall have affixed beside the indica- tion of the place of destination, a printed label of dark red color, or in place of it an inscription bearing in large letters the word Expres (special delivery). ARTICLE 134. Unprepaidor insufficiently prepaid articles. 1. Articles of correspondence on which any charge is to be collected after mailing, either from the addressee, or from the sender in the case of return as undeliverable, are marked with the T-stamp (postage due) in the upper right-hand corner of the front; the indication in francs and centimes of the amount to be collected is entered in very legible figures beside the stamp. 2. The application of the T-stamp, as well as the indication of the amount to be collected, is incumbent upon the Administration of ori- gin, or, in case of reforwarding or return as undeliverable, upon the redispatching Administration. However, if it is a question of articles coming from countries which apply reduced rates in relations with the Prepaid correspond- ence. Unregistered arti. cles. Cancellationofvalid stamps. Missent correspond- ence. Correspondence mailed on board ship. Reply-paid post cards. 3365
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