尽管拥有这些大规模杀伤性武器在技术上并不违法，但大部分国家加入了1993年化学武器公约，而叙利亚拒绝在该公约上签字。
Although possessing these weapons of mass destruction is technically not illegal, most states are parties to the 1993 Chemical Weapons Convention, which Syria has refused to sign.