In a speach given on 4 June 2009 at the kick-off meeting for the 2012 World Water Forum, the French Ministry for Ecology, Energy, Sustainable Development and the Sea confirmed that France was in the process of adhering to the 1997 UN Convention on the Law of the Non-navigational Uses of International Watercourses. This decision was voted by the French National Assembly on 8 April 2010 and will soon pass before the French Senate. The Minister's speach is available here (in French) on the World Water Council website.
France would thus follow Guinea-Bissau on 19 May 2010 as well as Spain and Tunesia in 2009 in acceding to the UN Convention. The Convention requires 35 contracting parties to enter into force (see sections 35 and 36). Current status of the Convention and list of the parties can be found here.