The document set

Seven standards documents are in force (MCC-001, MCC-100, MCC-200, MCC-400, MCC-700, MCC-800, MCC-850) — design, quantification, monitoring, verification, registry operations and the use of AI; MCC-600 is not yet made, and MCC-810/MCC-820 are drafts. Methodologies are drafted under MCC-200, which requires external peer review and then a public consultation of at least 30 days before approval (cll. 0040–0042). The one adopted text, M008, went through neither: it was adopted by founder decision because the Methodology Review Committee named in MCC-001 cl. 0082 has never been constituted. Adopted texts are published with their SHA-256 on the document register; texts in consultation are on the consultations page.

Read live from the register. No project is registered without an approved methodology (MCC-100 cl. 0008), and approval follows peer review and public consultation (MCC-200 cll. 0040–0042). The Methodology Review Committee named in MCC-001 cl. 0082 has never been constituted; MCC-001 cl. 0046 reserves methodology approval to that Committee, so on the Programme's reading (readiness register, L3.5) no methodology can presently be adopted, although MCC-200 cl. 0039 also names the Board. 5 of the 7 codes in this register (M003, M004, M005, M006, M008) denote a different methodology in MCC-200 v2.0 cl. 0120 than the one recorded here; the re-lettering that resolves it (MCC-CR-2026-002) waits on the same Committee. Retired methodologies remain listed for the record.

F01

Blue Carbon

Mangrove, seagrass, salt marsh, tidal wetland and coastal peat. Credited as MCC-CC where an approved carbon methodology quantifies net removals, with reversal-risk controls. Methodology texts are in development; none is approved.

F02Closed to applications

Restoration — coral reef, kelp forest, oyster reef

Closed to new applications. The taxonomy in force assigns this family the instrument code MCC-HYB, which founder decision FD-2026-09-03 item D1 abolished with no successor code, so no unit could be issued against an application accepted today. No methodology exists in this family and no project has been submitted under it.

F03

Fisheries

Sustainable fisheries and aquaculture, and habitat protection delivered through fisheries management. The marine outcome is a conservation unit; a carbon tonne requires a separately quantified life-cycle GHG method, never gear or catch mass alone.

F04

Pollution Prevention

Plastic, ghost gear, nutrient run-off and marine debris. Credited as conservation units; no carbon claim follows from mass removed or prevented alone. This is the only family with an approved methodology.

F05Closed to applications

MPA Management

Closed to new applications, for the reason given under F02: the taxonomy in force assigns this family the abolished MCC-HYB instrument code, and no methodology exists in it.

Families per the MCC-100 Annex — Definitions Register v1.0 §2, settled by founder decision FD-2026-08-24 item D5, which is the taxonomy in force and prevails on conflict. Founder decision FD-2026-09-03 item D2 would redraw these boundaries — coral, oyster and kelp would move to F05 and F02 would become blue-carbon avoided loss — and that decision has no published text; the boundaries are before the Governing Board. F02 and F05 are closed because the taxonomy in force assigns them an instrument code the Programme abolished, so an application accepted in either could not result in an issued unit. Draft methodology texts are open for stakeholder consultation and independent peer review before adoption; revisions follow the change-control process in MCC-200.