INTERNATIONAL AGREEMENTS OTHER THAN TREATIES [62 STAT. such a case, it applies to them, if need be, the rates and surcharges prescribed for the class of correspondence in which they have to be placed because of their contents, weight or dimensions. As for weticlet iiteedn articles exceeding the maximum weight-limits fixed by Section 1, they may be rated in accordance with their actual weight. ARTICLE 37. Prepayment. Ant, p. 3319. 1. As a general rule, all the articles designated in Article 35 must be fully prepaid by the sender. 2. Articles other than letters and single post cards which are un- prepaid or insufficiently prepaid, or reply post cards both halves of which are not fully prepaid at the time of mailing, are not dispatched. 3. When a large number of letters or single post cards is mailed unprepaid or insufficiently prepaid, the Administration of the country of origin has the option of returning them to the sender. ARTICLE 38. Charge on unprepaid or insufficiently prepaidcorrespondence. Po, P. 3329. 1. With the exceptions provided for by Article 57, Section 6, for Pos, p.3367. registered articles, and by Article 136, Sections 3, 4, and 5 of the Regulations for certain classes of redirected articles, letters and single post cards not prepaid or insufficiently prepaid are liable to a charge equal to double the amount of the missing postage, to be paid by the addressee; but that charge may not be lower than 5 centimes. 2. The same treatment may be applied, in the cases above con- templated, to other articles of correspondence which have been improperly dispatched to the country of destination. ARTICLE 39. Surcharges. 1. There may be collected, in addition to the rates fixed by Article 36, for every article transported by extraordinary services involving special expenses, a surcharge proportionate to those expenses. 2. When the rate of prepayment of the single post card includes the surcharge authorized by Section 1, the same rate is applicable to each half of the reply-paid post card. ARTICLE 40. Special charges. 1. The Administrations are authorized to charge an additional fee in accordance with the provisions of their own legislation for articles posted in their services for dispatch after the mails have closed. 2. Articles addressed to general delivery may be subjected by the Administrations of the countries of destination to such special charge as may be prescribed by their legislation for articles of the same kind in the domestic service. 3322
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