I'd suggest we say that, in the first round, the Liberal Party goes first, then the Bloc, the NDP, and the Conservatives; in the second round, the Liberals, the Conservatives, the Bloc, and the Conservatives; and in the third round, the Liberals, the Conservatives, the Liberals, the Conservatives, and, if there's additional time, the Bloc and the NDP.
On May 1st, 2006. See this statement in context.