After the first treaty expired, a new one was signed on 29 July 1969 and entered into force on 1 January 1971, with Madagascar and Mauritius becoming the 19th African state to take part in the convention.
A new one was signed on 29 July 1969. A new one was entered into force on 1 January 1971. This was with Madagascar and Mauritius. This was becoming the 19th African state. This was to take part in the convention. The first treaty expired.