* Note by the Secretariat:  In the following text a number of minor corrections are included which were required owing to certain errors and omissions in the English text of the original of the Convention and which were made by a Procès-Verbal of Rectification of the Original of the Convention, signed on 15 August 1973 and communicated to Governments by the Office of Legal Affairs of the United Nations in circular notes C.N.169. 1973. TREATIES-5 and C.N.321. 1974. TREATIES-1 dated 30 August 1973 and 9 December 1974 respectively.  They affect article 2, para. 7 (a) and the chemical formulae of certain substances in Schedules I, II and IV annexed to the Convention.