So instead of:
   The chair of the IAOC may be removed at any time by the affirmative
   vote of two-thirds of the voting members of the IAOC, or as a result
   of his or her departure from the IAOC.
we could say
  If the chair leaves the IAOC, or if two thirds of the voting IAOC members
  vote in favour of removing him, the term of the chair ends immediately.
Better?
another nit:
s/removing him/removal/
Geoff
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