Acts and proceedings of the Board not to be invalidated

No act or proceeding of the Board shall be deemed to be invalid by reason only of any defect in the constitution of the Board or of any irregularity in the procedure of the Board not affecting the merits of the case. No suit, prosecution or other legal proceedings shall lie against any person for anything which is in good faith done or intended to be done in pursuance of this Act or any rule made thereunder.