I think my method for removing the chairman – a simple motion to declare the office vacant (or declare the office vacant and seek nominations for a new chair) – is possibly more correct and less open to challenge. Once the office is vacant, the Secretary is entitled to take nominations and vote on a replacement which can be done without having to name the replacement in the minutes. Since the first rule of politics is to never ask a question to which you don’t know the answer, the replacement chairman or woman would already have been identified and the votes lined up.