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51-101, Standards of Disclosure for Oil and Gas Activities

Effective date:

September 30, 2003, except for subsequent amendments

Published by CSA:

October 3, 2003


This instrument establishes a regime of continuous disclosure for reporting issuers engaged in exploring for, developing or producing oil and gas, including the extraction of oil from oil sands or shale.

Recent developments




December 4, 2014


The amendments promote improved disclosure about resources other than reserves, provide increased flexibility for oil and gas issuers that operate and report in different jurisdictions or recover product types not previously recognized by NI 51-101. It also aligns NI 51-101 with the amended Canadian Oil and Gas Evaluation Handbook.

The amendments are effective July 1, 2015.

November 5, 2015

Additional guidance

The CSA published CSA Staff Notice 51-345, Disclosure of Abandonment and Reclamation Costs in National Instrument 51-101, Standards of Disclosure for Oil and Gas Activities and Related Forms, which summarizes certain information and requirements in recently amended NI 51-101 and related forms.

Note: The above summary of Recent Developments does not include consequential amendments made as the result of other projects.

For further details on the history of this Instrument, please refer to the OSC’s Web site.

Correction list for hyphenation

These words serve as exceptions. Once entered, they are only hyphenated at the specified hyphenation points. Each word should be on a separate line.