Answer:
The taps mean different things. It is explained in the explanation.
Explanation:
1 tap - Announces the result of a vote, to get attention, or to indicate to the members that they should be seated, ends meeting.
2 taps - Calls the meeting to order.
3 taps - Indicates to all members that they should rise/stand.
Series of Taps - Restores order in the meeting.