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How to send confidential information to the CNSC from within Canada

Protected vs. classified information

Protected: This applies to information that, if compromised, could cause injury to a person or an organization.

Classified: This applies to information that, if compromised, could cause injury to the nation.


  • Site security plans (classified - confidential)
  • Résumés (protected)
  • Radiation safety officer applications (protected)
  • Dose change requests (protected)
  • Any other document containing personal information (protected)

What is confidential information?

The Government of Canada categorizes sensitive information as either “protected” or “classified”. Classified information has three levels: confidential, secret and top secret.

Requirements for sending confidential information (for example, a site security plan) to the CNSC from within Canada are outlined below.  The transmission of protected, secret and top secret information is not addressed here.

If you are unsure if a document is confidential, consult your licensing specialist. If you are not sure who this is, please call 1-888-229-2672.

A Class II nuclear facility includes not only the prescribed equipment, but also the building (or parts of the building) housing the equipment, as well as any ancillary equipment needed for operation. The entire facility will be considered during licensing and compliance activities.

Instructions for sending confidential information

  • Send confidential information to the CNSC by registered mail through Canada Post, or by courier. Proof of delivery is not required, but is strongly recommended. Do not send confidential information by email.
  • Use a double envelope to prevent people from accidentally reading the contents. Do not put security markings such as “classified” or “confidential” on the outermost envelope. Address the outermost envelope to your licensing specialist as follows:

    (Name of current licensing specialist)
    Canadian Nuclear Safety Commission
    280 Slater Street
    P.O. Box 1046, Station B
    Ottawa, ON K1P 5S9

What the confidential document(s) must identify

  • the name of the sending organization
  • the date of creation or revision of the confidential information


  • If the confidential information is in electronic form (for example, on a USB key or a CD), it must be accompanied by a hard-copy covering letter that identifies the sending organization and a contact person in case of difficulties opening the document. Please do not password-protect or encrypt electronic documents.
  • Please provide the related Class II licence number if possible, as this will help ensure that the information is filed correctly.

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