Standard Documents

• Removed Chapter 3.4 Certificate Expiry as per resolution in Advisory Board on 31 May, 2023. CORCs no longer expire automatically after 5 years.
• Chapter numbering from Ch 3.5 unchanged for reference.

• CORC minimum durability set to 100 years
• Annex C discontinued: CORC issuance on Bio-based Building
• Materials methodology (storage durability of 50 years) ceased from January 2023.
• Chapter 1.2.3 added: reference to normative documents
• Chapter 2.1.4 added: reference to leakage
• Chapter 4 revised: description of “transfer of ownership” of a CORC instructed with a trade report
• Chapter 5 revised to allow publishing of Audit Reports and project description
• Enhanced Rock Weathering added as a valid Methodology.
• All Methodologies and templates published as separate documents in Puro.earth website. Annex A-H removed from this document

• Page numbers corrected in Table of Contents

• Annex H: Woody Biomass Burial

• Minor spelling mistakes corrected

• Renaming of “Direct Purchase” to “Service Provider Trade” to align to Appendix 1 Terms and Conditions.
• 4.2 Clarification of conditions related to Service Provider Trade.

• Annex A: Biochar chapter 4.2 - Spelling correction of 𝐶𝑜𝑟𝑔  

• Terminology change: replace "cancel/retirement" with "retire/retirement"
• 5.1 Reporting: Added possibility for beneficiary to delay (embargo) the publishing of the retirement for maximum 12 months

• 2.1.2 Environmental and social safeguards
• 2.1.3 Additionality and Baseline
• Annex A: Biochar methodology update from 2019 to 2022 to reflect the latest science

• Chapter 1.3: Governance by Advisory Board
• Chapter 3.8: Expiry extended
• Chapter 5: Issuance and cancellation reports from the Registry 

• Re-structuring: Separate chapters to describe rules for trading (Marketplace) and carbon removal crediting (Registry and Standard)
• Annex G: Geologically stored Carbon methodology 

• Chapter 3.1: Settlement is no longer tied to auctions
• Chapter 3.4: Purchase through Certificate Listing Service enabled
• Chapter 3.4: Pre-Purchase transactions enabled outside auctions
• Chapter 3.4.3: Transfer Request added to Pre-purchase agreement process 
• Chapter 4.3: Sale of CORCs enabled in external marketplaces
• Annex A, 1.1.12: requirements for safe handling of biochar

Updates

• Chapter 3.7 and 6.2: Extension of the expiry date by 6 months 
• Chapter 3.5.6: Online shop closed for 3 hours before and after the auction 
• Chapter 3.5: Possibility to select removal method in online shop 
• Numbering of subparagraphs in Chapter 1.5. and Annex A,B,C 

Updates

• Chapter 3.3: Certificate auctioning (changes from 48h blind to 96h half-blind)
• Chapter 3.4: Pre-purchase of Certificates (changes due to action mechanism update)
• Chapter 3.5 Certificate online purchase (added)
• Chapter 6.2: CORCs issued in Experiment phase will expire normally 12 months after Issuance date. 

Updates

• Chapter 3.2.4: CORCs may be issued for 18 months old production (previously 12 months)
• Chapter 3.3: editorial changes 
• Chapter 3.4: Pre-purchase of Certificates (CORCs)
• Chapter 6.4: Aim to use CORC income for growth

Update to annex C and F

• Annex C. Wooden Building element methodology modified to incorporate also biomass-based insulation materials. 
• Annex F. List of signatories included confidentially (not changed)