For the Liberal Party of Canada, the way the process works is that, up until the point at which a candidate is endorsed to Elections Canada—because once you're endorsed to Elections Canada, it's only you, the candidate, who can remove yourself from the ballot, as per the rules set out in the Canada Elections Act—the green light committee has the ability to revoke somebody's approval, but it would be the campaign chair who would have the authority to remove a candidate. However, that only goes up to the point at which Elections Canada has been informed because once Elections Canada is informed, the candidates need to remove themselves.
On April 25th, 2023. See this statement in context.