This is to ensure the continuity of an application that has been made, so it would avoid an individual who is handling both other narcotics and cannabis to have to refile a new application under the cannabis act. Whatever the other narcotic is would continue under the Controlled Drugs and Substances Act, and the amendment makes it clear that what is deemed is only in relation to cannabis, so there's this continuity in the application.
On October 3rd, 2017. See this statement in context.