back to the topic in hand...
In the rules, (
http://www.bots-united.com/council-rules.html)
3. Should a Council member resign, or go absent for an extended period of time, he/she must be replaced by nomination, followed by a majority vote cast by the remaining Council members. Any existing Bots United forum moderator or administrator can be nominated, or nominate himself, to join the Council.
By the sounds of it, the rules don't need to be changed, as long as there's at least one council member available.
One thing does need to be defined though: What exactly should be classed as "absent for an extended period of time"?