addressees in the countries of the Union where adelivery is or shall be organised, are fixed as follows:
1o For letters, 25 centimes in case of prepayment, and double that amount in the contrary case, for each letter not exceeding 20 grammes in weight, and 15 centimes in case of prepayment, and double that amount in the contrary case, for every weight of 20 grammes or fraction of 20 grammes above the initial weight of 20 grammes;
2o For post cards, in case of prepayment, 10 centimes for single cards or for each of the two halves of reply post cards, and double that amount in the contrary case;
3o For printed papers of every kind, commercial papers, and samples of merchandise, 5 centimes for each article or packet bearing a particular address and for every weight of 50 grammes or fraction of 50 grammes, provided that such article or packet does not contain any letter or manuscript note having the character of actual and personal correspondence, and that it be made up in such a manner as to admit of its being easily examined.
The charge on commercial papers cannot be less than 25 centimes per packet, and the charge on samples cannot be less than 10 centimes per packet.
2. In addition to the rates fixed by the preceding paragraph there may be levied:
1o For every article subject to the sea transit charges prescribed in paragraph 3, 2o, c, of Article 4, and in all the relations to which these transit rates are applicable, a uniform surtax which may not exceed 25 centimes per single rate for letters, 5 centimes per post card, and 5 centimes per 50 grammes or fraction of 50 grammes for other articles.
2o For every article conveyed by means of services maintained by Administrations foreign to the Union, or of extraordinary services in the Union giving rise to special expenses, a surcharge in proportion to those expenses.
When the rate of prepayment for the single post card comprises one or other of the surcharges authorised in the two preceding paragraphs, the same rate is applicable to each half of the reply-paid post card.
3. In case of insufficient prepayment, correspondence of every kind is liable to a charge equal to double the amount of the deficiency, to be paid by the addressees; but that charge may not exceed that which is levied in the country of destination on unpaid correspondence of the same nature, weight, and origin.
4. Articles other than letters and post cards must be prepaid at least partly.
