1. Any Contracting State which, under its domestic law, requires as a
condition of copyright, compliance with formalities such as deposit,
registration, notice notarial certificates, payment of fees or
manufacture or publication in that Contracting State, shall regard
these requirements as satisfied with respect to all works protected in
accordance with this Convention and first published outside its
territory and the author of which is not one of its nationals, if from
the time of the first publication all the copies of the work published
with the authority of the author or other copyright proprietor bear the
symbol of a lower case "c" inside of a circle accompanied by the name
of the copyright proprietor and the year of first publication placed in
such manner and location as to give reasonable notice of claim of
copyright.
2. The provisions of paragraph 1 shall not preclude any Contracting
State from requiring formalities or other conditions for the
acquisition and enjoyment of copyright in respect of works first
published in its territory or works of its nationals wherever published.
3. The provisions of paragraph 1 shall not preclude any Contracting
State from providing that a person seeking judicial relief must, in
bringing the action, comply with procedural requirements, such as that
the complainant must appear through domestic counsel or that the
complainant must deposit with the court or an administrative office, or
both, a copy of the work involved in the litigation; provided that
failure to comply with such requirements shall not affect the validity
of the copyright, nor shall any such requirement be imposed upon a
national of another Contracting State if such requirement is not
imposed on nationals of the State in which protection is claimed.
4. In each Contracting State there shall be legal means of protecting
without formalities the unpublished work of nationals of other
Contracting States.
5. If a Contracting State grants protection for more than one term of
copyright and the first term is for a period longer than one of the
minimum periods prescribed in Article IV, such State shall not be
required to comply with the provisions of paragraph 1 of this Article
in respect of the second or any subsequent term of copyright.