paragraph 2 shall not apply to photographic works
or to works of applied art; provided, however, that the term of
protection in those Contracting States which protect photographic
works, or works of applied art in so far as they are protected as
artistic works, shall not be less than ten years for each of said
classes of works.

4. (a) No Contracting State shall be obliged to grant protection to a
work for a period longer than that fixed for the class of works to
which the work in question belongs, in the case of unpublished works by
the law of the Contracting State of which the author is a national, and
in the case of published works by the law of the Contracting State in
which the work has been first published.

(b) For the purposes of the application of subparagraph (a), if the law
of any Contracting State grants two or more successive terms of
protection, the period of protection of that State shall be considered
to be the aggregate of those terms. However, if a specified work is
not protected by such State during the second or any subsequent term
for any reason, the other Contracting States shall not be obliged to
protect it during the second or any subsequent term.

5. For the purposes of the application of paragraph 4, the work of a
national of a Contracting State, first published in a non-Contracting
State, shall be treated as though first published in the Contracting
State of which the author is a national.

6. For the purposes of the application of paragraph 4, in case of
simultaneous publication in two or more Contracting States, the work
shall be treated as though first published in the State which affords
the shortest term; any work published in two or more Contracting States
within thirty days of its first publication shall be considered as
having been published simultaneously in said Contracting States.

ARTICLE IVbis

1. The rights referred to in Article I shall include the basic rights
ensuring the author's economic interests, including the exclusive right
to authorize reproduction by any means, public performance and
broadcasting. The provisions of this Article shall extend to works
protected under this Convention either in their original form or in any
form recognizably derived from the original.

2. However, any Contracting State may, by its domestic legislation,
make exceptions that do not conflict with the spirit and provisions of
this Convention, to the rights mentioned in paragraph 1 o