In the preamble of rule 18, room is required if a tack or jybe is a normal part of manoeuvre. A jybe at the finish to me is not a normal manouvre.
The important word is "including" which is just before the part you quoted. The tack or gybe is not a requirement, it's just saying that if you are entitled to room, then that includes room to tack or gybe if you need it.
