18. The Committee requested its Chairman to write to the authorities concerned for the following natural sites mentioned in the IUCN document in order that progress reports could be submitted to the Committee at its next session: Western Tasmania National Parks (Australia); Mt.Nimba (Cote d'Ivoire/Guinea); Machu Picchu Historic Sanctuary (Peru); Niokolo-Koba National Park (Senegal); Selous Game Reserve (Tanzania).