NI 43-101 and JORC Use the Same Words for Different Rules

A Measured Mineral Resource under Canada's NI 43-101 and a Measured Mineral Resource under Australia's JORC Code use the same word for a reason: both codes descend from the same international template. But identical vocabulary does not mean identical verification. The two regimes differ in who enforces them, who is allowed to sign off on the number, and — under a pending Canadian reform — whether one code can even be used to support the other's disclosure much longer. For an investor comparing a TSX-listed junior to an ASX-listed peer, the difference is not academic.

Same words, one template

Neither NI 43-101 nor the JORC Code invented the categories Measured, Indicated, Inferred, Proven, and Probable. Both align to the CRIRSCO International Reporting Template, maintained by the Committee for Mineral Reserves International Reporting Standards, which has coordinated national reporting bodies since it was formed in 1994 — Australasia's JORC, Canada's CIM, South Africa's SAMREC, Europe's PERC, and the United States' SME among them, 13 members in total[^1]. That is why a resource classified as Indicated in a Perth boardroom and a resource classified as Indicated in a Toronto boardroom rest on the same underlying definition of confidence in tonnage and grade. The convergence in terminology is deliberate, not coincidental.

Different machinery behind the same words

The categories match; the enforcement does not. NI 43-101 is a securities-law instrument, administered by the Canadian Securities Administrators and enforceable through provincial and territorial securities regulators — a false or misleading Technical Report is a securities-law problem, with the accompanying civil and regulatory exposure. The JORC Code is a professional reporting code, given legal teeth not by securities law but by ASX Listing Rules; a breach is, in the first instance, an exchange-compliance matter rather than a securities charge, though downstream continuous-disclosure liability can follow. Ontario Securities Commission guidance to the rule makes the practical consequence explicit: NI 43-101 requires substantially more technical disclosure to the market than the equivalent JORC Code, because the JORC Code is fundamentally a code for reporting the status of a mineral resource, while NI 43-101 is a code of securities disclosure[^2].

The dates matter too. NI 43-101 has been in force since February 2001, with its current form dating to amendments effective June 30, 2011[^2]. The JORC Code's current edition took effect December 20, 2012 and became mandatory under ASX Listing Rules from December 1, 2013, after a one-year transition period during which either the 2004 or 2012 edition could be used[^3]. Both codes, in their currently governing form, are now well over a decade old — worth flagging for anyone treating "the JORC Code" or "43-101" as a single static thing rather than a specific dated edition.

Qualified Person and Competent Person are close, not identical

Both regimes gate technical disclosure behind a named individual: a Qualified Person under NI 43-101, a Competent Person under JORC. Both need at least five years of experience relevant to the specific style of mineralisation and the specific task, and both need standing membership in a recognized professional body[^2][^4]. Where they diverge is in that membership test. NI 43-101's "professional association" is a broad, functional definition — any qualifying self-regulatory body of engineers or geoscientists anywhere in the world can satisfy it. JORC's Competent Person must belong to the AusIMM, the Australian Institute of Geoscientists, or a body on the Recognised Professional Organisation (RPO) list that ASX maintains on JORC's advice — a mechanism ASX introduced in 2003 and renamed "RPO" in March 2014 specifically to reflect the CRIRSCO-wide push toward recognizing equivalent bodies internationally[^4]. We covered what a Qualified Person actually is, and how to verify one's registration yourself, in a separate piece.

The bridge that exists today

NI 43-101 does not require every foreign project to be re-estimated from scratch under Canadian definitions. The Instrument defines an "acceptable foreign code" — a defined term that currently includes the JORC Code, the PERC Code (Europe), the SAMREC Code (South Africa), and the Certification Code (Chile) — precisely because these codes use resource and reserve categories substantially the same as the CIM Definition Standards that NI 43-101 mandates[^2]. In practice, this lets an issuer disclose a foreign project's resource estimate prepared under JORC without a full CIM re-classification, provided the disclosure otherwise meets NI 43-101's requirements. The number transfers; the sign-off does not — a JORC Competent Person's consent is not, on its own, a substitute for a Canadian Qualified Person taking responsibility for the Canadian filing.

The bridge is being dismantled

That bridge is scheduled to close. On June 12, 2025 the CSA published a proposal to repeal and replace NI 43-101 in its entirety, and one specific change is the removal of the acceptable-foreign-code option: under the proposed regime, mineral resource and reserve estimates would have to comply fully with the CIM Definition Standards, with no further recognition of JORC, SAMREC, PERC, or the Chilean Certification Code as substitutes[^5]. The comment period closed October 10, 2025. As of this writing, no effective date has been set and the current, 2011-form Instrument — acceptable-foreign- code definition intact — remains in force. But the direction of travel is clear: the CSA is choosing harmonization around the CIM standard specifically, not continued mutual recognition of JORC-family codes.

What this means for coverage

For a family office or independent analyst comparing a TSX-V explorer to an ASX-listed peer in the same commodity, the practical checklist is: which code governs the disclosure, which named person signed it, which report format backs the number, and — for any dual-listed issuer — whether both codes were actually satisfied or only one. That checklist gets harder to skip once the acceptable-foreign-code bridge closes; a JORC-classified resource that currently counts toward Canadian disclosure may not, in the replacement regime.

Mineralis records the governing code, the signing Qualified Person or Competent Person, and the underlying report format as structured metadata against every filing we ingest — specifically so a resource number does not get treated as interchangeable across jurisdictions just because the label on the page reads the same.

References

1. Committee for Mineral Reserves International Reporting Standards (CRIRSCO), the CRIRSCO International Reporting Template and member listing (crirsco.com); CRIRSCO formed 1994, coordinating 13 national reporting organizations including JORC (Australasia), CIM (Canada), SAMREC (South Africa), PERC (Europe), and SME (United States). Scope: international reconciliation framework, not itself a disclosure law.
2. Canadian Securities Administrators / Ontario Securities Commission, National Instrument 43-101 — Standards of Disclosure for Mineral Projects, in force since February 1, 2001, current form from the June 30, 2011 amendments, including the Instrument's defined term "acceptable foreign code" (JORC, PERC, SAMREC, and Chile's Certification Code). Scope: issuers reporting to Canadian securities regulators (TSX, TSX-V, CSE).
3. Joint Ore Reserves Committee (JORC), sponsored by the Australasian Institute of Mining and Metallurgy, the Australian Institute of Geoscientists, and the Minerals Council of Australia — JORC Code, 2012 Edition, effective December 20, 2012, mandatory under ASX Listing Rules from December 1, 2013. Scope: entities reporting Exploration Results, Mineral Resources, and Ore Reserves to the ASX.
4. ASX, list of Recognised Professional Organisations (RPO), maintained on JORC's advice; mechanism introduced by ASX in 2003, renamed "RPO" in March 2014. Scope: professional-body qualification for Competent Persons under the JORC Code.
5. Canadian Securities Administrators, Notice and Request for Comment, Proposed Repeal and Replacement of NI 43-101 — Standards of Disclosure for Mineral Projects, published June 12, 2025; comment period closed October 10, 2025; no effective date announced as of this writing. Scope: proposed rule, not yet in force.