Through the unanimous adoption of resolution 2017 (2011), the Council called upon Libyan authorities to take all necessary steps to ensure the proper custody of portable surface-to-air missiles, known as MANPADS (man-portable air defence systems), and all other arms and related materiel, as well as to meet Libya’s arms control, disarmament and non-proliferation obligations under international law, as well as to continue close coordination on the destruction of all stockpiles of chemical weapons with the Organization for the Prohibition of Chemical Weapons.