If, on a division upon a bill, or upon a Question for the approving or disapproving of subordinate legislation, less than thirty Lords have voted, the Lord Speaker shall declare the Question not decided, and the debate thereon shall stand adjourned to a subsequent sitting; and, if such division take place when the House is in committee, the Chair shall declare the Question not decided, whereupon the House shall resume, and shall be again in committee at a subsequent sitting.