1. Any Contracting State to which Article Vbis (1) applies may
adopt the following provisions:

(a) If, after the expiration of (i) the relevant period
specified in sub-paragraph (c) commencing from the date of
first publication of a particular edition of a literary, scientific
or artistic work referred to in paragraph 3, or (ii) any longer
period determined by national legislation of the State, copies
of such edition have not been distributed in that State to the
general public or in connexion with systematic instructional
activities at a price reasonably related to that normally
charged in the State for comparable works, by the owner of the
right of reproduction or with his authorization, any national of
such State may obtain a non-exclusive licence from the
competent authority to publish such edition at that or a lower
price for use in connexion with systematic instructional
activities. The licence may only be granted if such national, in
accordance with the procedure of the State concerned,
established either that he has requested, and been denied,
authorization by the proprietor of the right to publish such
work, or that, after due diligence on his part, he was unable to
find the owner of the right. At the same time as he makes his
request he shall inform either the international copyright
information centre established by the United Nations
Educational, Scientific and Cultural Organization or any
national or regional information centre referred to in sub-
paragraph (d).

(b) A licence may also be granted on the same conditions if,
for a period of six months, no authorized copies of the edition in