2.—Consequently, there is no necessity under this head for any accounts between the several Administrations of the Union, except as regards the payments mentioned in section 1 of the present Article.
3.—Neither the senders nor the addressees of letters and other postal articles can be called upon to pay, either in the country of origin or in that of destination, any postage or any postal fee other than those contemplated by the Articles above-mentioned.
Article 13
1.—Articles of correspondence of every kind are, at the request of the senders, delivered at the residence of the addressees by a special messenger immediately on their arrival, in those countries of the Union which consent to undertake this service in their reciprocal relations.
2.—These articles, which are endorsed "express", are subject to a special charge for delivery at the residence; this charge is fixed at 30 centimes, and must be paid in full and in advance, by the sender, in addition to the ordinary postage. It belongs to the Administration of the country of origin.
3.—When an article is destined for a locality where there is no post-office, the Postal Administration of the country of destination may levy an additional charge, up to the amount of the rate fixed for delivery by special messenger in its domestic service, a deduction being made of the fixed rate paid by the sender, or its equivalent in the money of the country which levies this additional charge.
4.—"Express" articles upon which the entire charges payable in advance have not been fully prepaid, are delivered by the ordinary means.
Article 14
1.—No additional charge is levied for the reforwarding of postal articles within the interior of the Union.
2.—Undelivered articles do not give rise to a restitution of the transit charges due to intermediary Administrations for the previous conveyance of said articles.
3.—Unpaid letters and post-cards, and insufficiently prepaid articles of every kind, which are returned to the country of origin, owing to their being reforwarded or because they have become undeliverable, are liable, at the expense of the addressees or senders, to the same rates as similar articles addressed directly from the country of the first destination to the country of origin.
Article 15
1.—Closed mails may be exchanged between the post offices of any one of the contracting countries and the commanders of naval squadrons or ships-of-war of the same country stationed abroad, through the intermediary of the territorial or maritime services depending on other countries.
