What should the chairman say if a main motion is not seconded?

When a main motion is made during a meeting, it requires a second from another member in order to bring it before the assembly for discussion and action. If there is no second, it indicates that there is not enough support or interest in the motion from the other members. Therefore, the chairman should state that "since there is no second, the motion is not before this meeting." This statement clarifies that without a second, the motion does not proceed to discussion or debate, thereby ensuring that the agenda remains focused on matters that have received sufficient support for consideration.

The other options do not accurately reflect the rules of parliamentary procedure. Stating that "the motion is accepted" would misrepresent the status of the motion, as it has not been brought forward without a second. Saying "the members may discuss it" also misguides because discussion can only occur if the motion is properly seconded. Lastly, suggesting that "we will revisit this later" implies an intention to put the motion on hold or bring it back, which is unnecessary since the motion was never accepted into discussion.