54 STAT.] UNIVERSAL POSTAL CONVENTION-MAY 23, 1939 ses taxes en plus ou en moins selon le cas et suivant les convenances de son systeme monetaire. 2.- Le tarif adopte par un pays s'applique aux taxes a percevoir A l'arrve par suite d'absence ou d'insuffisance d'affranchissement. III. Once avoirdupois. I1 est admis, par mesure d'ex- ception, que les pays qui, a cause de leur r6gime interieur, ne peu- vent adopter le type de poids m6trique decimal, ont la faculte d'y substituer l'once avoirdupois (28,3465 grammes) en assimilant 1 once A 20 grammes pour les lettres et les envois dits "Phono- post" et 2 onces A 50 grammes pour les papiers d'affaires, im- prim6s, impressions en relief d l'usagedes aveugles, echantillons et petits paquets. IV. Depot de correspondances a l'6tranger. Aucun pays n'est tenu d'achemi- ner, ni de distribuer aux destina- taires, les envois que des expedi- teurs quelconques domicili6s sur son territoire deposent ou font deposer dans un pays etranger en vue de b6enficier des taxes plus basses qui y sont etablies. La regle s'applique sans distinction, soit aux envois prepares dans le pays habite par l'exp&diteur et transportes ensuite A travers la frontilre, soit aux envois con- fectionnes dans un pays etranger. L'Administration int6ressee a le droit, ou de renvoyer les objets en question a l'origine, ou de les frapper de ses taxes interieures. Les modalit6s de la perception des taxes sont laissees a son choix. its rates higher or lower as the case may be, in order to suit the convenience of its monetary sys- tem. 2. The rates adopted by a coun- try are applicable to the charges to be collected upon arrival as a result of absence or insufficiency of prepayment. III Avoirdupois ounce It is agreed, as an exceptional measure, that countries which, on account of their domestic legisla- tion, can not adopt the decimal metric system of weights, have the option of substituting therefor the avoirdupois ounce (28.3465 grams), assimilating one ounce to 20 grams for letters and Phono- post articles, and 2 ounces to 50 grams for commercial papers, prints, raised print for the use of the blind, samples and small packets. IV Mailing of correspondence in another country No country is bound to forward or deliver to addressees articles which any senders domiciled on its territory mail or cause to be mailed in a foreign country with a view to profiting by lower rates which are established there. The rule applies, without distinction, either to articles prepared in the country inhabited by the sender and subsequently transported across the border, or to articles prepared in a foreign country. The Administration concerned has the right either to return the articles in question to origin or to charge them with its domestic postage rates. The methods of collecting the charges are left to its discretion. V. Coupons-reponse. Les Administrations ont la fa- culte de ne pas se charger du debit des coupons-r6ponse. V Reply coupons Administrations have the op- Reply coo tion of not undertaking the sale of reply coupons. 2097 Unpaid or insuffi- cient postage. Avoirdupois ounce. Mailing of corre- spondence in another country.
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