CSA Staff Notice 55-316 Questions and Answers on Insider Reporting and SEDI
4 Insider Information
4.1 General
Section 4.1.12

What If I Already Have An Insider Profile And Need To Add New Reportable Securities Or Related Financial Instruments?

We recommend that you file an opening balance for the new reportable security or related financial instrument and add a note in the general remarks field to explain that the balance reflects what you held on a specific date (e.g. April 30, 2010, the date NI 55-104 came into effect) rather than what you held on the date you became an insider.