This has to do with the definition of public accountant. It is based on a comment from the Canadian Bar Association. The definition as it's currently drafted in the bill references the two main ways a public accountant is appointed, either when the corporation is first created or at each annual meeting.
The Canadian Bar Association pointed out there are three other ways a public accountant could be appointed. Two are associated with a vacancy in the position and the final is if it's a court-appointed public accountant. The amendment is simply expanding the definition so that all five references to where a public accountant could be appointed are referenced in the definition itself.