General Provisions for Verification Measures Pursuant to Articles IV, V and VI, Paragraph 3

June 7, 2025

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A. Initial Inspections And Facility Agreements

  1. Each declared facility subject to on-site inspection pursuant to Articles IV, V, and VI, paragraph 3, shall receive an initial inspection promptly after the facility is declared. The purpose of this inspection of the facility shall be to verify information provided and to obtain any additional information needed for planning future verification activities at the facility, including on-site inspections and continuous monitoring with on-site instruments, and to work on the facility agreements.
  2. States Parties shall ensure that the verification of declarations and the initiation of the systematic verification measures can be accomplished by the Technical Secretariat at all facilities within the established time-frames after this Convention enters into force for them.
  3. Each State Party shall conclude a facility agreement with the Organization for each facility declared and subject to on-site inspection pursuant to Articles IV, V, and VI, paragraph 3.
  4. Facility agreements shall be completed not later than 180 days after this Convention enters into force for the State Party or after the facility has been declared for the first time, except for a chemical weapons destruction facility to which paragraphs 5 to 7 shall apply.
  5. In the case of a chemical weapons destruction facility that begins operations more than one year after this Convention enters into force for the State Party, the facility agreement shall be completed not less than 180 days before the facility begins operation.
  6. In the case of a chemical weapons destruction facility that is in operation when this Convention enters into force for the State Party, or begins operation not later than one year thereafter, the facility agreement shall be completed not later than 210 days after this Convention enters into force for the State Party, except that the Executive Council may decide that transitional verification arrangements, approved in accordance with Part IV (A), paragraph 51, of this Annex and including a transitional facility agreement, provisions for verification through on-site inspection and monitoring with on-site instruments, and the time-frame for application of the arrangements, are sufficient.
  7. In the case of a facility, referred to in paragraph 6, that will cease operations not later than two years after this Convention enters into force for the State Party, the Executive Council may decide that transitional verification arrangements, approved in accordance with Part IV (A), paragraph 51, of this Annex and including a transitional facility agreement, provisions for verification through on-site inspection and monitoring with on-site instruments, and the time-frame for application of the arrangements, are sufficient.
  8. Facility agreements shall be based on models for such agreements and provide for detailed arrangements which shall govern inspections at each facility. The model agreements shall include provisions to take into account future technological developments and shall be considered and approved by the Conference pursuant to Article VIII, paragraph 21 (i).
  9. The Technical Secretariat may retain at each site a sealed container for photographs, plans and other information that it may wish to refer to in the course of subsequent inspections.

B. Standing Arrangements

  1. Where applicable, the Technical Secretariat shall have the right to have continuous monitoring instruments and systems and seals installed and to use them, in conformity with the relevant provisions in this Convention and the facility agreements between States Parties and the Organization.
  2. The inspected State Party shall, in accordance with agreed procedures, have the right to inspect any instrument used or installed by the inspection team and to have it tested in the presence of representatives of the inspected State Party. The inspection team shall have the right to use the instruments that were installed by the inspected State Party for its own monitoring of the technological process of the destruction of chemical weapons. To this end, the inspection team shall have the right to inspect those instruments that it intends to use for purposes of verification of the destruction of chemical weapons and to have them tested in its presence.
  3. The inspected State Party shall provide the necessary preparation and support for the establishment of continuous monitoring instruments and systems.
  4. In order to implement paragraphs 11 and 12, appropriate detailed procedures shall be considered and approved by the Conference pursuant to Article VIII, paragraph 21 (i).
  5. The inspected State Party shall immediately notify the Technical Secretariat if an event occurs or may occur at a facility where monitoring instruments are installed, which may have an impact on the monitoring system. The inspected State Party shall coordinate subsequent actions with the Technical Secretariat with a view to restoring the operation of the monitoring system and establishing interim measures, if necessary, as soon as possible.
  6. The inspection team shall verify during each inspection that the monitoring system functions correctly and that emplaced seals have not been tampered with. In addition, visits to service the monitoring system may be required to perform any necessary maintenance or replacement of equipment, or to adjust the coverage of the monitoring system as required.
  7. If the monitoring system indicates any anomaly, the Technical Secretariat shall immediately take action to determine whether this resulted from equipment malfunction or activities at the facility. If, after this examination, the problem remains unresolved, the Technical Secretariat shall immediately ascertain the actual situation, including through immediate on-site inspection of, or visit to, the facility if necessary. The Technical Secretariat shall report any such problem immediately after its detection to the inspected State Party which shall assist in its resolution.

C. Pre-inspection Activities

  1. The inspected State Party shall, except as specified in paragraph 18, be notified of inspections not less than 24 hours in advance of the planned arrival of the inspection team at the point of entry.
  2. The inspected State Party shall be notified of initial inspections not less than 72 hours in advance of the estimated time of arrival of the inspection team at the point of entry.

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Articles

Preamble
General Obligations
Definitions and Criteria
Declarations
Chemical Weapons
Chemical Weapons Production Facilities
Activities Not Prohibited Under this Convention
National Implementation Measures
The Organization
Consultations, Cooperation and Fact‑Finding
Assistance and Protection Against Chemical Weapons
Economic and Technological Development
Measures to Redress a Situation and to Ensure Compliance, including Sanctions
Relation to Other International Agreements
Settlement of Disputes
Amendments
Duration and Withdrawal
Status of the Annexes
Signature
Ratification
Accession
Entry Into Force
Reservations
Depositary
Authentic Texts

Annexes

Annex on Chemicals

Annex on Chemicals

Table 1
Table 2
Table 3

Confidentiality Annex

Verification Annex

Definitions
General Rules of Verification
General Provisions for Verification Measures Pursuant to Articles IV, V and VI, Paragraph 3
Destruction of Chemical Weapons and Its Verification Pursuant to Article IV
Old Chemical Weapons and Abandoned Chemical Weapons
Destruction of Chemical Weapons Production Facilities and Its Verification Pursuant to Article V
Activities Not Prohibited under this Convention in Accordance with Article VI
Challenge Inspections Pursuant to Article IX
Investigations In Cases Of Alleged Use Of Chemical Weapons

Articles

Preamble
General Obligations
Definitions and Criteria
Declarations
Chemical Weapons
Chemical Weapons Production Facilities
Activities Not Prohibited Under this Convention
National Implementation Measures
The Organization
Consultations, Cooperation and Fact‑Finding
Assistance and Protection Against Chemical Weapons
Economic and Technological Development
Measures to Redress a Situation and to Ensure Compliance, including Sanctions
Relation to Other International Agreements
Settlement of Disputes
Amendments
Duration and Withdrawal
Status of the Annexes
Signature
Ratification
Accession
Entry Into Force
Reservations
Depositary
Authentic Texts

Annexes

Annex on Chemicals

Annexe sur les Produits Chimiques

Table 1
Table 2
Table 3

Annexe sur la Confidentialité

Verification Annex

Definitions
General Rules of Verification
General Provisions for Verification Measures Pursuant to Articles IV, V and VI, Paragraph 3
Destruction of Chemical Weapons and Its Verification Pursuant to Article IV
Old Chemical Weapons and Abandoned Chemical Weapons
Destruction of Chemical Weapons Production Facilities and Its Verification Pursuant to Article V
Activities Not Prohibited under this Convention in Accordance with Article VI
Challenge Inspections Pursuant to Article IX
Investigations In Cases Of Alleged Use Of Chemical Weapons