1. CMA 3 (Oct–Nov 2021) ‒ Decision 3/CMA.3, annex

• The CMA adopted rules, modalities and procedures (RMPs) for the Article 6.4 mechanism, containing provisions that allow transition to the Article 6.4 mechanism and key requirements for:
  • Registered clean development mechanism (CDM) activities;
  • Requests listed as provisional under the temporary measures adopted by the CDM Executive Board.

2. CMP 16 (Oct–Nov 2021) ‒ Decision 2/CMA.16

• The CMP decided that requests for registration, renewal of crediting period and issuance relating to emission reductions occurring after 31 December 2020 may not be submitted under the CDM, acknowledging such requests may be submitted under the Article 6.4 mechanism.
• The CMP requested the CDM Executive Board to reject provisional requests if they fail to transition to the Article 6.4 mechanism.
• The CMP decided that the CDM Executive Board may continue receiving requests under the temporary measures until the date when the process for submission of transition requests becomes operational.

3. CMA 4 (Nov 2022) ‒ Decision 7/CMA.4, annex I

• The CMA elaborated the conditions for crediting period and activity design for CDM activities that may transition to the Article 6.4 mechanism, as well as on the transition process.

1. EB 108 (December 2020) – Meeting report

• The CDM Executive Board agreed as temporary measures to process requests for registration, renewal of crediting period and issuance for project activities as well as corresponding submissions for programmes of activities (PoAs) relating to emission reductions occurring after 2020.
• CDM rules and requirements are applicable at the time of submission of the requests under the temporary measures (except for global warming potential values – for which applicable values are specified).
• If the requests meet all relevant CDM requirements, they are listed as provisional, pending guidance of the CMP.

2. SB 005 (March 2023) – Meeting report

• The Supervisory Body agreed to commence receiving transition requests from project participants on 30 June 2023.

3. SB 006 (July 2023) – Meeting report

• The Supervisory Body adopted a standard and a procedure for the transition of CDM activities to the Article 6.4 mechanism, including the finalization of the requests listed as provisional under the temporary measures.
• The Supervisory Body agreed to implement the transition standard and procedure from 1 January 2024, subject to the availability of the detailed regulatory elements required for the operationalization of the transition process

4. SB 008 (Oct-Nov 2023)- Meeting report

• The Supervisory Body revised the standard and procedure for the transition of CDM activities to the Article 6.4 mechanism.

5. SBM 013 (July 2024)- Meeting report

• The Supervisory Body revised the procedure for the transition of CDM activities to the Article 6.4 mechanism. This revision aims to provide flexibility for the transition of multi-country PoAs and includes provisions for revising and withdrawing a transition request.

1. According to relevant decisions of the CMA (decision 3/CMA.3, annex, chapter XI.A, and decision 7/CMA.4, annex I), project activities, programmes of activities (PoAs) registered under the CDM and component project activities (CPAs) included in registered CDM PoAs, or requests listed as provisional under the temporary measures adopted by the CDM Executive Board, may transition to the Article 6.4 mechanism if they meet all of the following conditions:

    (a) Their crediting periods or PoA periods would have been active as of 1 January 2021 (this condition is not applicable for provisional requests for registration);* 

     * For CDM project activities, if the crediting period had expired before 1 January 2021 and failed to submit a request for renewal under the CDM by 31 December 2021, it is no longer possible to meet this requirement.

     * For CDM PoAs, if the PoA period had expired before 1 January 2021, it is still possible to submit a request for renewal under the CDM to meet this requirement. However, it should be noted that taking such action now may not guarantee that the project participants may be able to submit a request for transition of such PoA, which shall be after the successful renewal of the PoA period under the CDM, by the deadline for submission of transition requests (31 December 2023).

    (b) Their activity types are among those indicated by the respective host Parties that they would approve in accordance with paragraph 26(e) of the rules, modalities and procedures for the Article 6.4 mechanism (RMPs);

    (c) They demonstrate compliance with the requirements of the RMPs in accordance with the guidance of the Supervisory Body;

    (d) The applied CDM methodologies meet the methodological requirements that may be specified by the respective host Parties in accordance with paragraph 27(a) of the RMPs, otherwise they shall be replaced with Article 6.4 mechanism methodologies.

2. All transitioning activities shall apply the same global warming potential values as applicable to any activities under the Article 6.4 mechanism (i.e. the values from IPCC fifth assessment report, or any updated values as agreed by the CMA).

3. The Supervisory Body adopted the regulatory documents for A 6.4 projects and programmes of activities as well as respective requirements for transition CDM activities to A6.4 mechanism.

The transition process comprises the following key steps:

1. Submission of transition request by the project participants to the secretariat (by 31 December 2023 for CDM project activity or PoA other than a CDM A/R project activity or CDM A/R PoA and CPAs therein; by 31 December 2025 for CDM A/R project activity or CDM A/R PoA and the CPAs therein);

2. Global stakeholder consultation (for 28 days);

3. Approval of transition by the host Party to the secretariat (by 30 June 2026);

4. Submission of additional documentation to the secretariat:

   (a) Addendum to the registered CDM PDD, or PoA-DD and CPA-DDs, to demonstrate compliance with the requirements for transition, by the project participants, if the activities continue to apply the currently applied CDM methodologies (by 31 December 2026); or 

   (b) Revised PDD, or PoA-DD and CPA-DDs, and validation report by the designated operational entity, if the activities switch to Article 6.4 mechanism methodologies (within 1 year of publication of the host Party approval or within 1 year after the applicable methodology becomes available, whichever is later);

5. Payment of transition fee (activities hosted in non LDC-SIDs are waived);

6. Completeness check by the secretariat;

7. Substantive check by the secretariat;

8. Possible review of the transition request by the Supervisory Body;

9. Approval or rejection of transition by the Supervisory Body;

10. If transition is approved, deregistration from the CDM.

For more details of the process for transition of CDM activities to the Article 6.4 mechanism and finalization of provisional requests under the Article 6.4 mechanism, please refer to the “Procedure for the transition of CDM activities to the Article 6.4 mechanism”.

Diagram: Transition Process

Credit: UNFCCC

The project participants of CDM activities eligible for transition to the Article 6.4 mechanism have been individually provided with a link to the web portal for submission of transition requests. They shall submit a transition request through the web portal, providing necessary information directly on the web interface.*

For more details, please refer to the “Procedure for the transition of CDM activities to the Article 6.4 mechanism”.

* The form for transition request contained in appendix 1 to the transition procedure has been converted into electronic format on the web interface.

31 December 2023, 24:00 (Central European Time) for CDM project activity or PoA other than a CDM A/R project activity or CDM A/R PoA and CPAs therein.

31 December 2025 for CDM A/R project activity or CDM A/R PoA and the CPAs therein.

(See paragraphs 12 and 13 of the “Procedure for the transition of CDM activities to the Article 6.4 mechanism”)

No. The secretariat will inform the host Party of receipt of transition request.
(See paragraph 16 of the “Procedure for the transition of CDM activities to the Article 6.4 mechanism”)

No. For requests for transition of registered CDM activities and requests for finalization of provisional requests for registration, failure to meet the specified deadlines would result in the impossibility of transitioning CDM activities or finalizing provisional requests for registration. 

To initiate the transition process, a transition request must be submitted before the deadline.

For requests for finalization of provisional requests for issuance, these deadlines do not apply (see paragraph 55(a) of the “Procedure for the transition of CDM activities to the Article 6.4 mechanism”), as the underlying CDM activities shall transition to the Article 6.4 mechanism first.

30 June 2026, 24:00 (Central European Time).
(See section V, paragraph 25 of decision -/CMA.7).

Yes, the UNFCCC secretariat has notified the focal points of the project participants of the CDM activities that may be eligible for transition to the Article 6.4 mechanism based on the status of their crediting period or PoA period.

They have been provided with a link to the web portal for submitting transition requests and another link for additional relevant information. This notification details the start date, submission deadline, and the procedure for processing transition requests. 

The crediting period of successfully transitioned CDM activities shall start on 1 January 2021. 
(See paragraphs 9, 10, 12, 13 of the “Standard for the transition of CDM activities to the Article 6.4 mechanism”).

The start of the crediting period of the activities in the provisional requests for registration that have been successfully finalized under the Article 6.4 mechanism will be determined in the same way as for any new Article 6.4 activities. 

After transition, the current crediting period or PoA period shall end on its original end date indicated under the CDM or 31 December 2025, whichever is earlier. 

The maximum remaining number of renewals for the crediting period or PoA period can be carried over from the CDM, unless the respective host Parties reject renewal as per paragraph 27(b) of the rules, modalities and procedures for the Article 6.4 mechanism. 

After the first renewal of the crediting period or PoA period under the Article 6.4 mechanism, each subsequent crediting period or PoA period shall follow the same duration as any new Article 6.4 mechanism activities.

It is expected that, for projects, programmes of activities and component project activities that successfully transitioned to the Article 6.4 mechanism but their crediting periods or PoA periods ended or will end after 31 December 2020, a renewal request must be made within one year of the Supervisory Body’s approval of the transition.  (See paragraph 243 of the “Article 6.4 activity cycle procedure for projects” and paragraphs 287 and 304 of the "Article 6.4 activity cycle procedure for programmes of activities").

Transitioned CDM activities may continue to apply the currently applied CDM methodologies until the earlier of the end of the current crediting period or PoA period until 31 December 2025.

However, transitioned CDM projects, or PoA and CPAs therein, need to replace CDM methodologies with Article 6.4 mechanism methodologies if they do not meet the methodological requirements specified by the host Party in accordance with paragraph 27(a) of the rules, modalities and procedures for the Article 6.4 mechanism (for further details see paragraphs 20‒25 of the “Standard for the transition of CDM activities to the Article 6.4 mechanism”).

In such case, the project participants may propose an Article 6.4 mechanism methodology in accordance with the procedure for the “Procedure: Development, revision and clarification of methodologies and methodological tools”, which will become operational from 2024 Q1, or wait for the Supervisory Body to develop one applicable to the activity through the revision of a CDM methodology to adapt to the Article 6.4 mechanism. It should be noted that Article 6.4 mechanism methodology development could happen only after the CMA agrees with methodological requirements.

Also in such case, additional documentation shall undergo validation by a designated operational entity prior to its submission, which shall be within 1 year of the publication of the host Party approval of transition or after the Article 6.4 mechanism methodology becomes available, whichever is later (see para. 32 of the “Procedure for the transition of CDM activities to the Article 6.4 mechanism”).

The start of the crediting period for all transitioning CDM activities is 1 January 2021, regardless of when an Article 6.4 mechanism methodology will become available. 

• Following provisional requests may be finalized under the transition process:
   
  • Provisional requests for registration;
     
  • Provisional requests for issuance, if the underlying CDM activities continue to apply the currently applied CDM methodologies at transition and successfully transitioned to the Article 6.4 mechanism;
     
  • Provisional inclusion of CPAs, if the corresponding CDM PoAs have successfully transitioned to the Article 6.4 mechanism without replacing the currently applied CDM methodologies and only in conjunction with, or subsequent to, the transition of the PoAs.

• Following provisional requests cannot be finalized under the transition process:
   
  • Provisional requests for renewal;
     
  • Provisional requests for issuance, if the underlying CDM activities have failed to transition to the Article 6.4 mechanism or underlying CDM activities replace the currently applied CDM methodologies with Article 6.4 mechanism methodologies at transition;
     
  • Provisional inclusion of CPAs, if the corresponding CDM PoAs have failed to transition to the Article 6.4 mechanism or replaced the currently applied CDM methodologies with Article 6.4 mechanism methodologies at transition.

• For provisional requests that cannot be finalized under the transition process, the corresponding requests may be submitted under the regular Article 6.4 mechanism activity cycle if the underlying CDM activities have successfully transitioned to the Article 6.4 mechanism, and if they comply with all relevant requirements applicable for any new such requests under the Article 6.4 mechanism.

• For more details, see section 6 of the “Procedure for the transition of CDM activities to the Article 6.4 mechanism” and section 5.4 of the “Standard for the transition of CDM activities to the Article 6.4 mechanism”.

• The process for finalization of provisional requests under Article 6.4 mechanism follows similar procedural steps to that for requests for the transition of CDM activities.
   
• Provisional requests for registration shall comply with similar activity design requirements as for transitioning registered CDM activities as contained in the “Standard for the transition of CDM activities to the Article 6.4 mechanism”. 
   
• For provisional requests for issuance:
   
  • The finalization under the transition process is possible only if the underlying CDM activities continue to apply the currently applied CDM methodologies at transition;
     
  • The transition of underlying CDM activities to the Article 6.4 mechanism is a precondition. This means that the transition of the underlying CDM activities has to be approved first before provisional requests for issuance may be finalized under the Article 6.4 mechanism;
     
  • If the underlying CDM activities have successfully transitioned to the Article 6.4 mechanism without replacing the currently applied CDM methodologies, only the monitoring reports shall be revised by applying the global warming potentials from IPCC fifth assessment report as contained in appendix to the “Standard for the transition of CDM activities to the Article 6.4 mechanism” for the calculation of achieved emission reductions or removals;
     
  • If the underlying CDM activities have voluntarily, or mandatorily as per the host Party requirements, replaced the currently applied CDM methodologies with Article 6.4 mechanism methodologies at transition, provisional requests for issuance are not eligible for finalization under the transition process. In this case, the issuance requests for the corresponding monitoring periods may be submitted under the regular Article 6.4 mechanism activity cycle, following the same rules as any new issuance requests under the Article 6.4 mechanism (see paragraphs 33‒35 of the “Standard for the transition of CDM activities to the Article 6.4 mechanism”);
     
  • The deadline for submission of requests for finalization (transition) (31 December 2023 or 31 December 2025) is not applicable, while the submission such request is still required;
     
  • Host Party approval is not required, as such approval should have been provided to the transition of the underlying CDM activities.

• Provisional requests for renewal may not be finalized under the transition process. The corresponding requests may be submitted under the Article 6.4 mechanism after the underlying CDM activities have successfully transitioned to the Article 6.4 mechanism.

• Provisional inclusion of CPAs may be finalized only if the corresponding CDM PoAs have successfully transitioned to the Article 6.4 mechanism without replacing the currently applied CDM methodologies and only in conjunction with the transition of the PoAs.

• See also FAQ “What is the process for transitioning CDM activities to the Article 6.4 mechanism?” and FAQ “Which provisional requests may be finalized under the Article 6.4 mechanism?”.

No. The CMP decided that “the Executive Board may continue receiving and processing the relevant requests and submissions under the temporary measures until the date when the process for submission of requests to the secretariat to transition the requests and other submissions that have been accorded provisional status to the Article 6, paragraph 4, mechanism becomes operational, as may be specified by the Supervisory Body” (Decision 2/CMP.16, paragraph 15). The Supervisory Body specified such date as 30 June 2023 (see the Supervisory Body fifth meeting report, paragraph 8).

Renewal of the crediting period and issuance of credits for emission reductions relating to the period after 2020 for registered CDM project activities, as well as corresponding actions for programmes of activities, may be possible under the Article 6.4 mechanism activity cycle if these CDM activities have successfully transitioned to the Article 6.4 mechanism first, and meet all relevant requirements applicable to any new renewal or issuance requests under the Article 6.4 mechanism activity cycle.

For more details on the process and conditions for such submissions, please refer to the Article 6.4 activity cycle procedure for projects and Article 6.4 activity cycle procedure for programmes of activities.

See paragraph 13 of the Article 6.4 activity cycle procedure for projects and paragraph 17 and 92 of the Article 6.4 activity cycle procedure for programmes of activities.

For the monitoring period up to the end of 2020, the CDM issuance process is applicable, for which currently there is no deadline for submission of requests for issuance of CERs.

It is important to highlight that the CMP plans to consider on the functioning and operation of the processes and institutions of the CDM in the future at its next session.