8. Vacancies, etc., not to invalidate proceedings of Board
No act or proceeding of the Board shall be invalid merely by reason of---
(a)
any vacancy in, or any defect in the constitution of, the Board; or
(b)
any defect in the appointment of a person acting as a member of the Board; or
(c)
any irregularity in the procedure of the Board not affecting the merits of the case.