62 STAT.] MULTILATERALUNIVERSAL POSTAL UNION-JULY 5, 1947 3327 3. Each coupon is exchangeable in any country for a stamp or stamps representing the postage on a single-rate ordinary letter originating in that country and addressed to a foreign country. 4. Moreover, the right is reserved for any country to require that the coupons and the articles of correspondence for the prepayment of which they are to be exchanged be presented at the same time. ARTICLE 54. Withdrawal. Change of address. 1. The sender of an article of correspondence may cause it to be withdrawn from the mails or have its address changed, provided that such article has not been delivered to the addressee, that it does not come within the scope of the provisions contained in Article 49, or A nt e,p. 3324. that the customs examination does not reveal any irregularity. 2. The request to be made to that effect is transmitted by mail or Charge. by telegraph at the expense of the sender, who shall pay for each re- quest a fee of 40 centimes at the most. If the request has to be transmitted by air mail or by telegraph, the sender shall pay, in addition, the air mail surcharge or telegraph charges. 3. For each request for withdrawal or change of address relating to several articles mailed simultaneously at the same office by the same sender to the same addressee, only one fee or surcharge as mentioned in Section 2 shall be collected. 4. A simple correction of address (without changing the name or the title of the addressee) may be requested of the office of destination directly by the sender, that is, without complying with the formalities and paying the charges mentioned in Sections 2 and 3. ARTICLE 55. Forwarding. Undelivered correspondence. 1. In case of change of residence by the addressee, articles of cor- respondence are forwarded to him, unless the sender has forbidden the forwarding by a notation placed on the address side in a language known in the country of destination. 2. Correspondence which is undeliverable shall be returned im- mediately to the country of origin. 3. The period of retention for correspondence held at the disposal of the addressees or addressed to general delivery is fixed by the regulations of the country of destination. However, such period may not exceed one month as a general rule, except in particular cases where the Administration of destination deems it necessary to extend it to two months at most. The return to the country of origin must take place within a shorter period, if the sender has so requested by a notation placed on the address side in a language known in the country of destination. I Transfer of the provision of Article 151 of the Regulations of Execution of the Buenos Aires Convention, 1939.
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