NI 43-101 — Standards of Disclosure for Mineral Projects
- Record: mining-cert-009 — NI 43-101 Standards of Disclosure for Mineral Projects
- Issuing body / enforcer: Canadian Securities Administrators (CSA); enforced via provincial securities commissions (notably the Ontario Securities Commission and BC Securities Commission)
- Jurisdiction: Canada — all issuers disclosing scientific/technical information about mineral projects (with global reach, since most of the world's mining juniors list in Toronto/Vancouver)
- Record type / importance: standard / flagship
- Last verified: 2026-09-30
What it is
The securities-law instrument that makes Canadian mining disclosure the global reference standard: any public statement about a mineral project by a Canadian-listed issuer must comply with NI 43-101's rules on resource/reserve classification, qualified-person responsibility, and technical-report form (Form 43-101F1). It exists because of the Bre-X fraud (1997) — the regime is designed so that no company can announce a "world-class discovery" without a named, liable professional standing behind the numbers.
Scope: who/what it applies to, triggers, thresholds
- All issuers (not just miners) disclosing scientific or technical information about a mineral project — exploration results, mineral resources, mineral reserves, preliminary economic assessments, feasibility studies.
- Trigger: any public disclosure — press releases, websites, investor presentations, social media. The instrument catches informal promotion, not just filings.
- Materiality: technical reports are required for first-time disclosure of resources/reserves, PEAs, and pre-feasibility/feasibility studies on material properties.
Key requirements and compliance obligations
- Qualified Person (QP): disclosure must be prepared by or under the supervision of a QP — an engineer or geoscientist with 5+ years relevant experience, in good standing with a recognized professional association, with relevant experience in the subject matter. The QP takes personal professional liability for the disclosure.
- Resource/reserve classification: measured/indicated/inferred resources and proven/probable reserves, with inferred resources excluded from economic analyses except in narrowly defined PEA circumstances (with prescribed cautionary language).
- Form 43-101F1 technical reports: 23-item prescribed format covering geology, sampling/QA-QC, data verification, metallurgy, economics, environmental/permitting status, and risks — filed on SEDAR+ and subject to commission review.
- Prohibited disclosure: no "in-situ valuations," no misleading economic targets without the prescribed basis, no disclosure of historical estimates without prescribed cautionary statements.
- Data verification and QA/QC: the QP must verify the data relied upon; sampling and assay QA/QC programs must be described.
Penalties and consequences
- Securities enforcement: cease-trade orders, administrative penalties, officer/director bans, and reputational destruction in the mining-finance ecosystem. Misrepresentation can draw criminal prosecution (provincial securities offences) and civil liability for secondary-market misrepresentation.
- Exchange consequences: TSX/TSXV can delist or suspend issuers for disclosure failures. Practically, a 43-101 violation ends management careers in Canadian mining.
Version/edition status and LIVE changes (verified 2026-09-30)
- NI 43-101 (2001, as amended — last significant amendments 2011) remains in force; no wholesale rewrite as of Sept 2026. CSA staff notices periodically clarify disclosure expectations (notably on preliminary economic assessments and on climate/ESG-adjacent disclosure creeping into technical reports).
- Live context: the JORC Code review (provisional JORC 2026 in final approval) will, once adopted, widen the gap between the two major codes until NI 43-101 is next amended — dual-listed issuers should watch CSA's response. The rise of critical-minerals disclosure (lithium, rare earths) has commissions scrutinizing metallurgical and economic assumptions more closely.
- Cross-reference: the JORC Code (2012) brief covers the Australasian equivalent; CRIRSCO alignment keeps the two systems mutually intelligible but not interchangeable.
Related certifications (Mining flagship/license)
- QP under NI 43-101 (mining-cert-003): the person-status this instrument creates — flagship by definition.
- SME Registered Member (mining-cert-002): SME is a recognized professional association for QP purposes.
- PE Mining and Mineral Processing (mining-cert-001): licensed-engineer standing supporting QP eligibility.
- JORC Competent Person (mining-cert-004): the Australasian analogue.
Honest flags
- CSA staff-notice activity and any 2026 amendment proposals were not verified item-by-item; confirm current Companion Policy 43-101CP guidance before relying on procedural details.
Original ETS reference writing, verified against public sources on 2026-09-30. Thin sourcing is flagged inline. Not legal advice — confirm current editions with the issuing body.