(E/F/S/R/C/A) : English, French, Spanish, Russian, Chinese, Arabic version; This Agreement entered into effect on December 17, 1974. A Protocol incorporating the Agreement was signed by Kurt Waldheim, Secretary-General of the United Nations, and Arpad Bogsch, Director General of the World Intellectual Property Organization, on January 21, 1975; See French version in ACCORD ENTRE L'ORGANISATION DES NATIONS UNIES ET L'ORGANISATION MONDIALE DE LA PROPRIETE INTELLECTUELLE; See Spanish version in ACUERDO ENTRE LAS NACIONES UNIDAS Y LA ORGANIACION MUNDIAL DE LA PROPRIEDAD INTELECTUAL;.