ventions or
arrangements before the date on which this Convention comes into force
in such State shall not be affected. Nothing in this Article shall
affect the provisions of Articles XVII and XVIII.

ARTICLE XX

Reservations to this Convention shall not be permitted.

ARTICLE XXI

1. The Director-General shall send duly certified copies of this
Convention to the States interested and to the Secretary-General of the
United Nations for registration by him.

2. He shall also inform all interested States of the ratifications,
acceptances, accessions which have been deposited, the date on which
this Convention comes into force, the notifications under this
Convention and denunciations under Article XIV.

APPENDIX DECLARATION RELATING TO ARTICLE XVII

The States which are members of the International Union for the
Protection of Literary and Artistic Works (hereinafter called "the
Berne Union") and which are signatories of this Convention,

Desiring to reinforce their mutual relations on the basis of the said
Union and to avoid any conflict which might result from the coexistence
of the Berne Convention and the Universal Copyright Convention,

Recognizing the temporary need of some States to adjust their level of
copyright protection in accordance with their stage of cultural, social
and economic development,

Have, by common agreement, accepted the terms of the following
declaration:

(a) Except as provided by paragraph (b), works which, according to the
Berne Convention, have as their country of origin a country which has
withdrawn from the Berne Union after 1 January 1951, shall not be
protected by the Universal Copyright Convention in the countries of the
Berne Union;

(b) Where a Contracting State is regarded as a developing country in
conformity with the established practice of the General Assembly of the
United Nations, and has deposited with the Director-General of the
United Nations Educational, Scientific and Cultural Organization, at
the time of its withdrawal from the Berne Union, a notification to the
effect that it regards itself as a developing country, the provisions
of paragraph (a) shall not be applicable as long as such State may
avail itself of the exceptions provided for by this Convention in
accordance with Article Vbis;

(c) The Universal Copyright Convention shall not be applicable to the
relationships among countries of the Berne Union in so far as it
relates to the protection o