Thank you for your thoughtful and clear answers, along with the references to RONR. I've read parts of the book, but I hadn't previously managed to read all of the references that you had provided. In addition, your answers provided very useful connecting threads that helped clarify it in my mind. Thank you also for correcting my terminology for the adjourned meeting.
Separately, we do provide for Special General Meetings:
Special General Meetings (SGM) to amend the Constitution and/or Bylaws require a petition by at least 10% of the membership; SGMs for all other purposes require a petition signed by at least 8 members or 5% of the membership, whichever is greater. SGMs can be called by a majority of the executive as required. The meeting shall be held five weeks following the announcement of the SGM, with the membership invited to submit additional proposals for motions or amendments according to the same schedule as that indicated above for an AGM.
Thus, it is possible to cover everything in an SGM, but there is a potentially non-trivial threshold that must be met to declare the meeting.