definition of passing

Overtaking rule states: (d) Any subsequent alteration of the bearing between the two vessels shall not make the overtaking vessel a crossing vessel within the meaning of these Rules or relieve her of the duty of keeping clear of the overtaken vessel until she is finally past and clear. How is 'finally past and clear' does it mean once the overtaking vessel is less than 22.5º abaft the beam of the overtaken vessel, which would put it abeam, or when the overtaken vessel is later 22.5º abaft the previously overtaking vessel.