12.1 No rule shall be added to these rules, nor any existing rule altered, except by resolution of a two-thirds majority of Members of the Society assembled in General Meeting requisite notice having been given.
12.2 No proposition for such addition or alteration, except an amendment to an addition or alteration duly proposed, shall be brought before any General Meeting, unless with the consent, previously obtained of the Council, or upon the requisition in writing of any six Members of the Society. Such requisition shall be sent to the Secretary at least 28 days before the holding of such General Meeting.