Which officer is pivotal in maintaining order during a meeting and upholding rules?

The Parliamentarian plays a vital role in maintaining order during meetings and ensuring that established rules are followed. This position is directly responsible for advising the presiding officer, typically the President, on parliamentary procedure, which helps to facilitate orderly conduct of meetings. The Parliamentarian ensures that discussions adhere to the agreed-upon rules, allowing for fair and efficient debates, while also managing issues such as motions and points of order.

In contrast, while the Secretary is responsible for recording meeting minutes and the Treasurer handles financial matters, their roles do not specifically focus on maintaining order or enforcing rules during interactions. The President, although a key figure in guiding the meeting, may rely on the Parliamentarian's expertise to navigate procedural nuances. Therefore, the Parliamentarian's unique function is crucial in upholding the structure and decorum of meetings, reinforcing why this position is essential in the context of this question.