Соответствующая норма
Czechoslovakia
Practice Relating to Rule 74. Chemical Weapons
In 1966, during a debate in the First Committee of the UN General Assembly, Czechoslovakia supported Hungary’s view that the 1925 Geneva Gas Protocol had developed into customary international law and that the use of chemical weapons constituted an international crime. 
Czechoslovakia, Statement before the First Committee of the UN General Assembly, UN Doc. A/C.1/SR.1455, 16 November 1966, p. 172.
In 1989, in reply to a note verbale of the UN Secretary-General on the subject of chemical weapons, Czechoslovakia declared that it did not possess chemical weapons. 
Czechoslovakia, Reply to a note verbale of the UN Secretary-General, referred to in Report of the Secretary-General on respect for the right to life: elimination of chemical weapons, prepared in accordance with UN Sub-Commission on Human Rights Resolution 1988/27, UN Doc. E/CN.4/Sub.2/1989/4, 17 August 1989, § 98.
At the 1989 Session of the Conference on Disarmament, Czechoslovakia stated:
Two days before the Paris Conference, on 5 January, the Government of Czechoslovakia released a statement on issues concerning the prohibition and elimination of chemical weapons. This statement reaffirmed that Czechoslovakia does not possess, manufacture or stockpile on its territory any chemical weapons. Nor does it own facilities for their development or production. All scientific research in this field is oriented exclusively towards protection against the effects of chemical weapons and other peaceful goals. 
Czechoslovakia, Statement before the Conference on Disarmament, UN Doc. CD/PV.488, 21 February 1989, p. 10.
At the 1992 Session of the Conference on Disarmament, Czechoslovakia said that it had repeatedly stated that “it did not possess chemical weapons, and had declared its intention to become an original signatory of the [Chemical Weapons Convention]”. 
Czechoslovakia, Statement before the Conference on Disarmament, UN Doc. CD/1136, UN Doc. CD/CW/WP.389, 27 February 1992, p. 1.