CSA Staff Notice 55-316 Questions and Answers on Insider Reporting and SEDI
3 Issuer Information
3.2 Issuer Profile Supplement
Section 3.2.11

What If A Class Of Securities On The Drop-Down List Box Of Security Designations Is No Longer Issued Or Outstanding?

You should amend your issuer profile supplement and indicate that this security is now to be listed as an ‘Archived security’. Insiders will still be able to report transactions in these securities, using the ‘Archived security’ list.