The standing orders would require that the notice of the amendments be given on the day after the report. So the report will be received on May 25 and presented in the House during Routine Proceedings that day. Obviously the notice of the amendments would have to be given before six o'clock that day to be considered the next day. Normally you have an extra day.
The Chair will have the amendments by six o'clock and will be able to work on its ruling overnight and communicate with the parties. If there are a lot of amendments it may mean an all-night work session for the Chair.