What is the Consolidated Mining Standard?

Executive summary

The Consolidated Mining Standard Initiative (CMSI) is the most important development in mining sustainability standards of the past two decades. Four organisations that historically published independent assurance frameworks — The Copper Mark, the International Council on Mining and Metals (ICMM), the Mining Association of Canada (TSM) and the World Gold Council (WGC) — are converging into a single benchmark with shared governance, shared assurance and shared evidence requirements.

The Initiative is operated through miningstandardinitiative.org. As of April 2026, CMSI has gone through two rounds of public consultation: a first draft published in July 2024 and a final consultation in 2025. Publication of the final standard is expected during 2026, with implementation guidance and assurance arrangements following soon after.

1. What is CMSI?

CMSI stands for Consolidated Mining Standard Initiative. The output of the Initiative is the Consolidated Mining Standard (CMS) — a unified, voluntary, performance-based standard that sets responsible-mining expectations for individual operating mine sites. Although voluntary, CMSI is designed to replace the existing assurance programmes of its four founding organisations over time.

In practical terms, a mining company that today assesses the same mine site against TSM, The Copper Mark Risk Readiness Assessment (RRA) and the WGC Responsible Gold Mining Principles will, once CMSI launches, perform a single CMSI assessment that satisfies all four founders' requirements.

The standard is commodity-agnostic: it applies to copper, gold, zinc, nickel, molybdenum, iron ore and any other operating mine site that the founders' members produce.

2. Why was CMSI created?

For almost twenty years, the global mining industry operated under a fragmented assurance landscape. A typical large mine site could be subject to:

• The ICMM Mining Principles (10 principles, member-only),
• The TSM protocols (9 protocols, 31 indicators) for any operation in a country whose national association adopted TSM,
• The Copper Mark RRA (33 criteria) for copper, molybdenum, nickel and zinc operations,
• The WGC RGMP (10 principles, 51 sub-principles) for gold operations,
• Plus jurisdictional regulations and downstream procurement standards (LME, automotive, electronics).

The result, especially for diversified miners, was an audit fatigue problem: dozens of overlapping requirements, multiple verification cycles, redundant evidence collection, and inconsistent benchmarks of what counts as "good".

"Companies were being asked to prove the same thing in five different ways, to five different bodies, on five different timelines."
— industry observation reflected in the CMSI consultation report

CMSI was created to solve this. Its three explicit goals:

1. Reduce duplication — one assessment, multiple recognitions.
2. Increase transparency — clear public criteria, public assurance, public results.
3. Raise the bar — converge upward toward leading practice, not downward to a lowest common denominator.

3. The four founding organisations

CMSI is governed by four founding organisations, each of which contributed an existing assurance framework as input to the consolidation:

Governance is distributed across a Steering Committee (representatives of the four founders), a Standards Committee (technical authors), a Multi-Stakeholder Advisory Committee (civil society, communities, downstream buyers, investors) and an Independent Expert Panel. The full governance map is published at miningstandardinitiative.org/governance-model/.

4. Timeline: from 2023 to 2026

The Consolidated Mining Standard has moved fast for a multi-organisation standard. Key milestones:

5. Scope: 24 Performance Areas, 48 sub-sections

The Consolidated Mining Standard organises its requirements into 24 Performance Areas (PAs), each with two sub-sections, for a total of 48 sub-sections. The 24 PAs are grouped into six themes:

Each Performance Area has two sub-sections (e.g. "Tailings & mine waste" splits into "Tailings storage facilities" and "Mineral waste & non-tailings residues"). Each sub-section is then assessed against criteria written at three levels.

6. The performance ladder: Foundational / Good Practice / Leading Practice

Unlike binary pass/fail standards, CMSI uses a three-level performance ladder for each sub-section. This is conceptually similar to TSM's C/B/A/AA/AAA, but compressed to three named levels with explicit policy goals.

An assessment report includes the achieved level for each of the 48 sub-sections, with rationale, evidence references and gaps from the criteria text. Insufficient evidence is treated as not foundational.

7. Audit and assurance model

The CMSI assurance model has three layers — designed to balance rigour with practicality:

Layer 1 — Self-assessment

The operating mine site self-assesses against the 48 sub-sections, documents evidence and publishes results. This is the entry point and is expected from all sites within the founders' membership.

Layer 2 — Third-party verification

An accredited third-party verifier reviews the self-assessment, tests evidence on site, and issues a verification report. Verification cadence: every 3 years per site (with annual updates on closed gaps).

Layer 3 — Public assurance & multi-stakeholder review

Verification reports and CMSI Performance Area scores are public by default on the CMSI registry. Multi-stakeholder bodies (indigenous peoples, civil society, downstream buyers) can flag concerns, triggering investigation.

8. CMSI vs. TSM, RRA, RGMP, ICMM Principles

The four founding frameworks remain valid until CMSI is finalised and migration completes. A simplified comparison:

vs. TSM (Mining Association of Canada)

TSM's 31 indicators across 9 protocols translate into CMSI Performance Areas with significant scope overlap (water, biodiversity, indigenous peoples, tailings, safety, crisis management). The TSM C/B/A/AA/AAA ladder is replaced by CMSI's Foundational/Good/Leading ladder. Run the TSM.AI assessment now →

vs. The Copper Mark RRA

The 33 RRA criteria map almost one-to-one onto CMSI sub-sections, with stricter wording in several places (e.g. tailings, indigenous peoples). Copper Mark sites are expected to migrate to CMSI directly. Run the TCM AI Assessor →

vs. WGC Responsible Gold Mining Principles

RGMP's 10 principles & 51 sub-principles align particularly well with CMSI's Communities and Workforce themes. WGC has indicated that RGMP-conformant operations will get a streamlined migration.

vs. ICMM Mining Principles

The ICMM 10 Principles are deliberately high-level and depend on Position Statements for technical depth. CMSI provides the operational specification that the ICMM Principles always lacked at site level.

vs. IRMA

The Initiative for Responsible Mining Assurance (IRMA) is not a CMSI founder. IRMA remains the leading multi-stakeholder standard with formal civil-society co-governance. IRMA and CMSI are expected to coexist; some operations may pursue both.

vs. GISTM

The Global Industry Standard on Tailings Management (GISTM) is a topic-specific standard (tailings only, 77 requirements) and is not being absorbed by CMSI. CMSI's "Tailings & mine waste" PA references GISTM as the operational benchmark for tailings.

9. Impact on mining operators

For an operator already aligned with TSM, RRA, RGMP or the ICMM Principles, the practical effects of CMSI are:

• One assessment cycle per site instead of two-to-four — typical reduction of 30–50% in audit-related effort.
• One evidence pack — managed once, traceable across all four legacy frameworks.
• Public site-level scores — the assurance shift from company-level summaries to site-level criterion scores is significant for stakeholder engagement.
• Stricter wording in several Performance Areas — particularly indigenous peoples, water stewardship and tailings — that may require new policies, plans or procedures even for currently well-rated sites.
• Migration scheduling — operators must plan how their existing TSM, RRA or RGMP cycles converge into the CMSI cadence.

10. Civil society and downstream views

CMSI has been welcomed by some stakeholders and criticised by others. Notable positions:

• Industry consensus — supportive: less duplication, clearer expectations, single audit footprint.
• Civil-society critiques — notably the Lead the Charge briefing for automakers argue that without IRMA-style multi-stakeholder governance, CMSI may codify industry-led criteria below current best practice in some areas.
• Downstream buyers (automotive, electronics, jewellery) — broadly supportive; some have indicated they will recognise CMSI as a procurement criterion alongside or instead of legacy frameworks.
• Investors — interested in the public site-level transparency; ESG analysts note that CMSI scores will become a comparable input across portfolios.

11. How to prepare for CMSI today

Operators do not need to wait for the final standard to start preparing. Practical steps for 2026:

1. Map your current evidence base against the 24 Performance Areas (CMSI v2 draft is public). The mapping itself surfaces gaps regardless of the final wording.
2. Run a TSM and Copper Mark RRA pre-audit on the operations that will likely be in the first migration wave. Both already overlap >70% with CMSI. TSM.AI → · TCM AI Assessor →
3. Run a CMSI pre-audit directly against the consultation draft. Data Riders' CMSI AI Assessor evaluates the 24 Performance Areas / 48 sub-sections on the Foundational / Good Practice / Leading Practice ladder, using your existing documentation.
4. Reorganise evidence into a single repository — site-level, criterion-tagged, with policies, plans, monitoring data, training records and review minutes.
5. Identify "stretch areas" — sub-sections where you are likely to be below Foundational. Prioritise corrective action over the next 12–18 months.
6. Engage rights-holders early — particularly indigenous peoples, host communities, workers and downstream buyers. Several Performance Areas explicitly require co-design and joint review.

12. How Data Riders helps

Data Riders has been involved with the four founding frameworks since their early days — independent audits, consulting and technical services for tailings, water and ESG. We are currently running CMSI readiness work with multiple operations.

Two of our AI agents are directly relevant to CMSI:

13. Official resources & further reading

14. Frequently asked questions

Is CMSI mandatory?

No. CMSI is voluntary. However, members of the four founding organisations are expected to migrate, and downstream buyers (automotive, electronics, jewellery) are likely to reference CMSI in procurement.

Will TSM, RRA and RGMP disappear?

The four founders have signalled they will progressively retire their legacy frameworks once CMSI is operational, but the transition will be multi-year and the legacy assurance cycles will be honoured during the migration.

Does CMSI cover tailings?

Yes — the "Tailings & mine waste" Performance Area covers tailings storage facilities, but CMSI references GISTM as the operational benchmark. GISTM is not absorbed into CMSI.

Will Data Riders' AI agents be updated?

Yes. The CMSI AI Assessor already operates against the consultation-stage criteria. We will refresh it to the final standard within 30 days of publication.