As a matter of procedure, anything requiring voting on should not be brought up in any other business. The whole point of an agenda is that the delegates know what they will be talking about and prepare themselves accordingly. That is how proper informed decisions get taken.
In AOB you don't know what is going to arise and so by definition you are not properly prepared.
Everyone knows far enough in advance that the meeting will be taking place and they have opportunity to let the secretary know what issues they would like to raise.
In the groups that I manage (in shooting and outside) I don't allow AOB on the agenda. Urgent matters that have come forward since the agenda was circulated can be discussed with the approval of the chair but no commitment can be made to alter rules or spend money.