ACR generally accepts methodologies and tools approved for use by the Clean Development Mechanism (CDM) and ACR-reviewed and approved methodolgies from other programs to the extent that they comply with ACR’s Standards. ACR also gives Project Proponents the flexibility to propose modifications to ACR-approved methodologies and tools.

The following list of methodologies are presumptively approved for use on ACR in addition to ACR-approved methodologies: 

• All CDM methodologies which are fully approved by the CDM Executive Board. (http://cdm.unfccc.int/methodologies/index.html)
• CDM consolidated methodology AR-ACM0001 Afforestation and Reforestation of Degraded Land - Version 5 for use on ACR for registration of U.S. domestic and international A/R projects. Please also see clarifications for use on ACR.
• U.S. EPA Climate Leaders Greenhouse Gas Inventory Protocol Offset Project Methodology for Project Type: Landfill Methane Collection and Combustion.  (http://www.epa.gov/stateply/documents/resources/draft_landfill_offset_protocol.pdf)

If a Project Proponent wishes to apply a methodology not included on this list, the Proponent should submit the methodology for review by ACR’s expert methodology review committee. The committee will assess the methodology and determine whether it is approved for use without modifications, approved contingent on certain modifications, or not approved. A link to all current CDM methodologies is below.

• Clean Development Mechanism