UNITED NATIONS : UN Secretary-General Ban Ki-moon Tuesday renewed his call for the earliest entry into force of the Comprehensive Nuclear-Test-Ban Treaty (CTBT), which prohibits all nuclear tests across the world.

“Now it is time for the international community to exercise political will and act,”  Ban said in his message to the CTBT: Science and Technology 2013 Conference in Vienna, Austria.

The CTBT bans all nuclear explosions in all environments, for military or civilian purposes. It was adopted by the General Assembly in September 1996 but has not yet entered into force.

The Conference was organized by the Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO), which is tasked with building up the treaty’s verification regime.