Editing Casting vote (section)

===''Robert's Rules of Order'' ===
Under some rules of [[parliamentary procedure]], notably ''[[Robert's Rules of Order]]'', the presiding officer does not have a "casting vote" in the way it is normally understood as a duty or option to vote to break a tie. 

Robert's Rule of Order Newly Revised (12th Edition, 2020) does not include the concept of a casting vote. In RONR the presiding officer may vote by ballot and vote to break a tie. Quite differently than a casting vote, however, the presiding officer can also vote to cause a tie, defeating the motion (RONR 4:56, 44:12). 

On small boards, however, those that are fewer than 12 persons, Robert's Rules empowers the chair to use their rights as members. If a member, not only may the chair debate all questions, but the chair can also vote on all questions: "If the Chairman is a member, he may, without leaving the chair, speak in informal discussions and in debate, and vote on all questions." (RONR 49:21, 7). 

Informal discussions and motions may even be initiated by the chair (see footnote 4, 49:21). The chair of either small or large boards may only vote once (44:12), but if the chair of a small board withholds that vote until the mind of the house is known, the chair may vote to break or to cause a tie.