When C-59 was drafted, a dedicated mobility scheme was created to allow employees from the federal government to move in to NSIRA and move out. You'll see this again with the intelligence commissioner. In hindsight, that was a mistake. That should not have happened, following further legal advice, discussions with the Public Service Commission, and so on. All these amendments do is strip out the dedicated regime that was built and use the exact language in the PSEA.
On April 19th, 2018. See this statement in context.