CIM Staff - 18 September 2026

A practical guide

Navigating technical mineral disclosure can be complex, whether you are an industry newcomer, an investor reading a technical report, or a practitioner looking for a quick reference. But understanding NI 43-101 matters because it sets requirements for how issuers disclose scientific and technical information about mineral projects in Canada and provides a common framework for assessing and communicating mineral resources and reserves.

Knowing the basics can help industry professionals interpret technical information, understand the responsibilities behind it and recognize what compliant disclosure should include.

To provide a clear starting point, the Mineral Resources and Mineral Reserves Society (MRMRS) of the Canadian Institute of Mining, Metallurgy and Petroleum has published a new informational page: Understanding NI 43-101.

Why a plain-language reference matters

National Instrument 43-101 sets the standard for how Canadian public mining companies disclose scientific and technical data. While the regulatory documents and technical guidelines are detailed, having an accessible overview helps explain key concepts:

• Core principles: How the framework protects market integrity and promotes transparent, reliable reporting
• The CIM connection: How the CIM Definition Standards form the foundation of resource and reserve classification under the instrument
• The Qualified Person (QP): A straightforward look at the professional credentials and responsibilities required to sign off on technical disclosure

A useful bookmark for members and observers

This page serves as a handy, plain-language reference for students, market analysts, and mining professionals alike.

If you are looking to brush up on the fundamentals of disclosure standards or want a reliable link to share with colleagues and clients, check out the new page:

Read "Understanding NI 43-101" on the CIM website ➜ 

Discover the Mineral Resources & Mineral Reserves Society of CIM ➜ 

Register for the MRMRS Conference ➜

Access Standards, Leading Practices & Guidance for Mineral Resources and Mineral Reserves ➜