That's correct.
I've been involved in this a number of times. As a police officer, I used to come up to Ottawa to help with big protests up here, too. We've always faced a challenge. Police officers coming from anywhere else across the country, particularly RCMP officers, are not sworn in as constables for the province of Ontario and are therefore unable to enforce certain laws and provisions in this jurisdiction.
In order to facilitate the movement of police officers from across Canada so they could come to Ottawa to help with these measures, a section in the Emergencies Act allowed those RCMP officers to act as police officers here in the province of Ontario, or anywhere else in the country where they required that authority.