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Rh In the cases mentioned under the Nos. 1, 2, and 3, the Office which exchanges the mails is not entitled to any payment for transit. In all the other cases the transit rates shall be paid according to the stipulations of Article 10.

The exchange of letters with value declared and of Post Office money orders shall form the subject of ulterior arrangements between the various countries or groups of countries composing the Union.

The Postal Administrations of the various countries composing the Union are competent to draw up, by common consent, in the form of detailed regulations, all the measures of order and detail necessary with a view of the execution of the present treaty. It is understood that the stipulations of these detailed regulations may always be modified by the common consent of the Administrations of the Union.

The several Administrations may make amongst themselves the necessary arrangements on the subject of questions which do not concern the Union generally; such as the regulations of exchange at the frontier, the determination of radii in adjacent countries within which a lower rate of postage may be taken, the conditions of the exchange of Post Office money orders and of letters with declared value, etc., etc.

The stipulations of the present treaty do not involve any alteration in the interior postal legislation of any country, nor any restriction of the right of the contracting parties to maintain and to conclude treaties, as well as to maintain and establish more restricted unions with a view to a progressive improvement of postal relations.

There shall be organized, under the name of the International Office of the General Postal Union, a central office, which shall be conducted under the surveillance of a Postal Administration to be chosen by the Congress, and the expenses of which shall be borne by all the Administrations of the contracting States.

This office shall be charged with the duty of collecting, publishing, and distributing information of every kind which concerns the international postal service; of giving, at the request of the parties concerned, an opinion upon questions in dispute; of making known proposals for modifying the detailed regulations; of giving notice of alterations adopted; of facilitating