Here’s what the final document of the First Special Session of the General Assembly devoted to Disarmament (1978) said about chemical weapons:
Along with these measures, agreements or other effective measures should be adopted to prohibit or prevent the development, production or use of other weapons of mass destruction. In this context, an agreement on elimination of all chemical weapons should be concluded as a matter of high priority.
The complete and effective prohibition of the development, production and stockpiling of all chemical weapons and their destruction represent one of the most urgent measures of disarmament. Consequently, the conclusion of a convention to this end, on which negotiations have been going on for several years, is one of the most urgent tasks of multilateral negotiations. After its conclusion, all States should contribute to ensuring the broadest possible applica- tion of the convention through its early signature and ratification.