The Finance Department says the territory will join British Columbia, Ontario, Saskatchewan, New Brunswick and Prince Edward Island.
Once implemented, the co-operative national body is expected to help oversee stock markets by policing abuses and securities fraud.
Canada currently is the only G20 country without a national securities regulator.
Ottawa says the participating jurisdictions are inviting the remaining provinces and territories to join the system.
But the key jurisdictions of Alberta and Quebec have refused to join the national regulator.