Once a quorum has been established for a Board meeting, does it continue to exist if Board members leave during the course of the meeting?
The answer is “No”. According to Robert’s Rules of Order, Newly Revised (11th Edition), once a quorum has been established, the quorum continues to exist only until the Chair or any other member of the Board of Directors notices that a quorum is no longer present. If the Chair notices the absence of a quorum, he or she should announce this fact. Any member noticing the absence of a quorum can also make a Point of Order whenever another person is not speaking. Business should only be transacted by a quorum of the Board of Directors.