This is the principal document used by project participants to receive CDM and voluntary carbon market project approval. Its format is outlined in Appendix B of the Modalities and Procedures of the CDM. Its contents are evolving, and may change over time as the Executive Board (EB) of
UNFCCC is continuously working on improving the modalities and procedures of the CDM. Most voluntary carbon market standards utilize the CDM PDD format but some of the standards have their own standard-specific format.