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Rh rights, provided they comply with the formalities and requirements imposed by the National laws of each State upon its own citizens. Any obligation of domicile or of establishment in the country where the protection is claimed shall not be imposed on the members of the Union.

The subjects or citizens of countries which do not form part of the Union, who are domiciled or own effective and bona fide industrial or commercial establishments in the territory of any of the countries of the Union, shall be assimilated to the subjects or citizens of the contracting countries.

(a) Any person who shall have duly filed an application for a patent, utility model, industrial design or model, or trademark, in one of the contracting countries, or the successor or assignee of such person shall enjoy, for the purpose of filing application in the other countries, and subject to the rights of third parties, a right of priority during the periods hereinafter specified.

(b) Consequently, the subsequent filing in one of the other countries of the Union, prior to the expiration of such periods, shall not be invalidated by acts performed in the interval, especially, by another application, by publication of the invention or the working of the same, by the sale of copies of the design or model, nor by the use of the mark.

(c) The periods of priority above referred to shall be twelve months for patents and models of utility and four months for industrial designs and models as also for trademarks.

(d) Whoever shall wish to avail himself of the priority of an anterior filing, shall be required to make a declaration showing the date and the country of this filing. Each country shall determine at what moment, at the latest, this declaration must be executed. This information shall be mentioned in the publications issued by the competent Administration, particularly on patents and the specifications relative thereto. The contracting countries shall require of one who makes adeclaration of priority the production of a copy of the application (specification, drawings, etc.) previously filed, certified to be a true copy by the Administration which shall have received it. This copy shall be dispensed from any legalisation. It may be required that it be accompanied by acertificate of the date of filing, issuing from this Administration, and of atranslation. Other formalities shall not be required for the declaration of priority at the time of the filing of the application. Each contracting country shall determine the consequences of the omission of the formalities prescribed by the present article, unless these consequences exceed the loss of the right of priority.

(e) Later other justifications can be demanded.