Соответствующая норма
Yemen
Practice Relating to Rule 74. Chemical Weapons
In 1991, during a debate in the UN Security Council, Yemen stated that it supported the eradication of weapons of mass destruction in the Middle East, but that the unilateral disarmament of Iraq would create imbalance in the region. 
Yemen, Statement before the UN Security Council, UN Doc. S/PV.2981, 3 April 1991, p. 42.