May 2013: The Rotterdam Convention Secretariat has announced that Sao Tome and Principe has acceded to the Rotterdam Convention. This brings the number of paties to the Rotterdam Convention to 153.

According to the Secretariat, Sao Tome and Principe deposited its instrument of accession with the UN Secretary-General on 23 May 2013. The Rotterdam Convention will enter into force for Sao Tome and Principe on 21 August 2013. [Rotterdam Convention Website]