Question: When did the united nations ban chemical weapons?

Disambiguated questions and answers:
context: In 1966, United Nations General Assembly resolution 2162B called for, without any dissent, all states to strictly observe the protocol. In 1969, United Nations General Assembly resolution 2603 (XXIV) declared that the prohibition on use of chemical and biological weapons in international armed conflicts, as embodied in the protocol (though restated in a more general form), were generally recognized rules of international law. Following this, there was discussion of whether the main elements of the protocol now form part of customary international law, and now this is widely accepted to be the case.
question: When did the united nations ban chemical weapons by calling for all states to strictly observe the Geneva protocol?
short_answers: 1966
wikipage: Geneva Protocol
context: Intergovernmental consideration of a chemical and biological weapons ban was initiated in 1968 within the 18-nation Disarmament Committee, which, after numerous changes of name and composition, became the Conference on Disarmament (CD) in 1984. On 3 September 1992 the Conference on Disarmament submitted to the U.N. General Assembly its annual report, which contained the text of the Chemical Weapons Convention. The General Assembly approved the Convention on 30 November 1992, and the U.N. Secretary-General then opened the Convention for signature in Paris on 13 January 1993. The CWC remained open for signature until its entry into force on 29 April 1997, 180 days after the deposit of the 65th instrument of ratification (by Hungary). The convention augments the Geneva Protocol of 1925 for chemical weapons and includes extensive verification measures such as on-site inspections. It does not, however, cover biological weapons.
question: When did the united nations ban chemical weapons with the Chemical Weapons Convention signing?
short_answers: 13 January 1993
wikipage: Chemical Weapons Convention
context: The Chemical Weapons Convention (CWC) is an arms control treaty that outlaws the production, stockpiling, and use of chemical weapons and their precursors. The full name of the treaty is the Convention on the Prohibition of the Development, Production, Stockpiling and Use of Chemical Weapons and on their Destruction and it is administered by the Organisation for the Prohibition of Chemical Weapons (OPCW), an intergovernmental organization based in The Hague, The Netherlands. The treaty entered into force on 29 April 1997. The Chemical Weapons Convention prohibits the large-scale use, development, production, stockpiling and transfer of chemical weapons. Very limited production for research, medical, pharmaceutical or protective purposes is still permitted. The main obligation of member states under the convention is to effect this prohibition, as well as the destruction of all current chemical weapons. All destruction activities must take place under OPCW verification.
question: When did the united nations ban chemical weapons with the Chemical Weapons Convention becoming effective?
short_answers: 29 April 1997
wikipage: Chemical Weapons Convention

Long-form answers:
knowledge: content: The Geneva Protocol, is a treaty prohibiting the use of chemical and biological weapons in international armed conflicts. 
wikipage: Geneva Protocol
content: The Chemical Weapons Convention (CWC), officially the Convention on the Prohibition of the Development, Production, Stockpiling and Use of Chemical Weapons and on their Destruction, is an arms control treaty administered by the Organisation for the Prohibition of Chemical Weapons (OPCW), an intergovernmental organization based in The Hague, The Netherlands. The treaty entered into force on 29 April 1997, and prohibits the large-scale use, development, production, stockpiling and transfer of chemical weapons and their precursors, except for very limited purposes (research, medical, pharmaceutical or protective).
wikipage: Chemical Weapons Convention
content: As of March 2021, 193 states have become parties to the CWC and accept its obligations. Israel has signed but not ratified the agreement, while three other UN member states (Egypt, North Korea and South Sudan) have neither signed nor acceded to the treaty
wikipage: Chemical Weapons Convention
long_answer: In 1966, United Nations General Assembly resolution 2162B called for, without any dissent, all states to strictly observe the Geneva Protocol. The Geneva Protocol is a treaty prohibiting the use of chemical and biological weapons in international armed conflicts. Additionally, on 3 September 1992 the Conference on Disarmament submitted to the U.N. General Assembly its annual report, which contained the text of the Chemical Weapons Convention. The Chemical Weapons Convention is an arms control treaty that prohibits the large-scale use, development, production, stockpiling and transfer of chemical weapons and their precursors, except for very limited purposes such as research, medical, pharmaceutical or protective. The U.N General Assembly approved the Chemical Weapons Convention, and the U.N. Secretary-General then opened the Chemical Weapons Convention for signature in Paris on 13 January 1993. The treaty entered into force on 29 April 1997. As of March 2021, 193 states have become parties to the Chemical Weapons Convention and accept its obligations. Israel has signed but not ratified the agreement, while three other U.N. member states, Egypt, North Korea and South Sudan, have neither signed nor acceded to the treaty.