The attached provisional list of participants attending the twentieth sessions of the Subsidiary Body for Scientific and Technological Advice and the Subsidiary Body for Implementation, to be held from 16 to 25 June 2004, has been prepared on the basis of information received by the secretariat as at Sunday, 13 June 2004. A final list of participants will be issued on Friday, 25 June 2004, taking into account additional information received by the secretariat prior to that date and including any corrections submitted. Corrections should be given to Ms. Heidi Sandoval (Registration counter) by 12 noon, at the latest, on Tuesday, 22 June 2004.