Document History of REGDOC-3.5.3, Regulatory Fundamentals

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Regulatory document REGDOC-3.5.3, Regulatory Fundamentals, outlines the CNSC’s regulatory philosophy and approach to applying the Nuclear Safety and Control Act. It provides information for licensees, applicants and the public, and contains neither guidance nor requirements. The information in this regulatory document will be of interest to anyone seeking to learn more about the CNSC and how it regulates nuclear activity in Canada.

This document supersedes:

REGDOC-3.5.3, Regulatory Fundamentals, Version 2, includes a new appendix, entitled Appendix A: Consideration of Cost-Benefit Information, which outlines how the CNSC considers cost-benefit information submitted by applicants, licensees, Indigenous peoples and stakeholders with respect to regulatory matters. The appendix on cost-benefit analysis is a result of previous work and consultation performed by the discussion paper, DIS-16-01, How the CNSC Considers Information on Costs and Benefits: Opportunities to Improve Guidance and Clarity(2016) and the associated What We Heard Report – DIS-16-01(2017).

The focus of this appendix is on information for stakeholders to consider should they choose to submit a cost-benefit analysis to the CNSC for licensing matters or for regulatory documents. How cost-benefit information is used in the development of regulations is out of scope of this appendix because it is a Treasury Board Secretariat-led process.

In addition, a minor update was made to the main body of the document to include information on the CNSC’s role with respect to impact assessments under the Impact Assessment Act (IAA).


January 2021: Published.

Document Milestone Dates Links
Consultation on draft REGDOC-3.5.3, Regulatory Fundamentals N/A N/A
Presentation to the Commission N/A N/A
Publication August 22, 2018 View the news release
Version 2 Approved by the Commission December 4, 2020 N/A
Version 2 Publication January 2021

HTML version of REGDOC-3.5.3, Version 2

PDF version of REGDOC-3.5.3, Version 2 | 37 pages, 996 KB

Contact information

For questions and information related to REGDOC-3.5.3, Regulatory Fundamentals, Version 2, contact:

Regulatory Policy Directorate

Canadian Nuclear Safety Commission
P.O. Box 1046, Station B
280 Slater Street
Ottawa, ON, Canada K1P 5S9

Telephone: 1-800-668-5284 (Canada only)
Fax: 613-995-5086

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