(1) In order that the author of a literary or artistic work protected by this Convention shall, in the absence of proof to the contrary, be regarded as such, and consequently be entitled to institute infringement proceedings in the countries of the Union, it shall be sufficient for his name to appear on the work in the usual manner. This paragraph shall be applicable even if this name is a pseudonym, where the pseudonym adopted by the author leaves no doubt as to his identity.

(2) The person or body corporate whose name appears on a cinematographic work in the usual manner shall, in the absence of proof to the contrary, be presumed to be the maker of the said work.

(3) In the case of anonymous and pseudonymous works, other than those referred to in paragraph (1) above, the publisher whose name appears on the work shall, in the absence of proof to the contrary, be deemed to represent the author, and in this capacity be shall be entitled to protect and enforce the author's rights. The provisions of this paragraph shall cease to apply when the author reveals his identity and establishes his claim to authorship of the work.

(4)

• (a) In the case of unpublished works where the identity of the author is unknown, but where there is every ground to presume that he is a national of a country of the Union, it shall be a matter for legislation in that country to designate the competent authority who shall represent the author and shall be entitled to protect and enforce his rights in the countries of the Union.
• (b) Countries of the Union which make such designation under the terms of this provision shall notify the Director General by means of a written declaration giving full information concerning the authority thus designated. The Director General shall at once communicate this declaration to all other countries of the Union.