Validation of acts and proceedings

21.(1) No act done or proceedings taken under this Act shall be questioned on the ground merely of— (a) the existence of any vacancy in or any defect in the constitution of the Corporation or any standing, joint or other committees or any disqualification in less than half of the Councillors or members of the Committee present when the act or proceeding was done or taken; (b) any defect or irregularity not affecting the merits of the case. (2) Every meeting of the Corporation, or any of the standing, joint or other committees, the minutes of the proceedings of which have been duly signed by the person presiding over the meeting, shall be deemed to have been duly convened and when the minutes are confirmed at a subsequent meeting shall be deemed to be free from all defects and irregularities and the accidental omission to serve notice of a meeting on any Councillor shall not affect the validity of the meeting.