The standard definition of a quorum in Robert's Rules of Order is that the majority of an assembly must be present to conduct business. That is, if there are twenty members of a group, eleven must be present to constitute a quorum. The same requirement for a quorum applies to PTCs, with one additional provision. The Handbook (4.1.8.3) provides that absentee votes will be counted in PTCs, whereas Robert's Rules really do not provide for a mixture of absentee and in-person votes in an assembly