D.—(1) Any person desiring to take advantage of the priority of a previous filing shall be required to
make a declaration indicating the date of such filing and the country in which it was made. Each country
shall determine the latest on which such declaration must be made.
(2) These particulars shall be mentioned in the publications issued by the competent authority, and in
particular in the patents and the specifications relating thereto.
(3) The countries of the Union may require any person making a declaration of priority to produce a
copy of the application (description, drawings, etc.) previously filed. The copy, certified as correct by the
authority which received such application, shall not require any authentication, and may in any case be
filed, without fee, at any time within three months of the filing of the subsequent application. They may
require it to be accompanied by a certificate from the same authority showing the date of filing, and by
a translation.
(4) No other formalities may be required for the declaration of priority at the time of filing the
application. Each country of the Union shall determine the consequences of failure to comply with the
formalities prescribed by this Article, but such consequences shall in no case go beyond the loss of the
right of priority.
(5) Subsequently, further proof may be required.
Any person who avails himself of the priority of a previous application shall be required to specify the
number of that application; this number shall be published as provided for by paragraph (2), above.
E.—(1) Were an industrial design is filed in a country by virtue of a right of priority based on the filing of
a utility model, the period of priority shall be the same as that fixed for industrial designs.
(2) Furthermore, it is permissible to file a utility model in a country by virtue of a right of priority based
on the filing of a patent application, and vice versa.