Any request concerning the applicability of variations CA 1, CA 2, CA 3, CA 4, CA 5 or CA 6 must be addressed to:

- Canadian Nuclear Safety Commission
  Transport Licensing and Strategic Support Division
  Directorate of Nuclear Substance Regulation
  P.O. Box 1046 - Station B
  280 Slater Street
  Ottawa, Ontario
  Canada K1P 5S9
  Telephone: toll free, Canada only: 1-800-668-5284
  Telephone: (613) 995-5894
  Facsimile: (613) 995-5086
  Email: cnsc.transport.ccsn@canada.ca