Rule 12.5. Putting the question
Before putting any debatable question, the President shall ask: "Are you ready for the question?" When it is evident that no senator wishes to speak the question shall be put by the President and the voting machine shall be opened by the Secretary and shall be used to record the vote of the senators. The President shall put the question in substantially the following form: "As many as are in favor of (as the question may be), will vote yes (green light) when the machine is opened; those opposed will vote no (red light). The Secretary will open the machine." After the senators have voted, the President shall order the Secretary to close the machine and shall announce the vote.