Section 6. Vacancies, etc., not to invalidate proceedings of the Board or the Executive Committee

6. Vacancies, etc., not to invalidate proceedings of the Board or the Executive Committee.— No — act or proceeding of the Board or the Executive Committee shall be invalidated by reason of (a) any vacancy in the Board or the Executive Committee; (b) any defect in the composition of, or in any appointment to, the Board or the Executive Committee; (c) any irregularity in the procedure of the Board or the Executive Committee not affecting the merits of the case.