What is the term used for the minimum number of members necessary for business to be validly transacted?

The term "quorum" refers to the minimum number of members that must be present in order for the meeting to conduct valid business. This requirement is established to ensure that there is sufficient representation and participation from the membership to make decisions that reflect the group's interests. Without a quorum, any decisions made or votes taken may be deemed invalid, as there wouldn't be enough members present to justify the outcomes or actions taken during the meeting.

The concept of a quorum is fundamental in parliamentary procedure because it protects the integrity of the decision-making process, ensuring that actions are not taken by an incomplete or unrepresentative group. This highlights the importance of member participation and ensures that a fair number of voices are considered in the decision-making process.