It was a little after the Government of Ontario's decision that was announced in mid-November, around November 15 or 16, 2018.
Shortly after that decision was announced, Minister Joly indicated her concern about the Government of Ontario's decisions to Minister Mulroney in writing. I have the letter here. She also asked for a meeting with Minister Mulroney as soon as possible in order to discuss the situation.
That was Minister Joly's first letter. There was a second letter in January to get an update on the situation.