An act or decision of the Board is not invalid only because—
(a) of a vacancy in its membership; or
(b) of a defect or irregularity in the appointment of any of its members; or
S. 73(2) renumbered as s. 73(c) by No. 11/2002 s. 3(Sch. 1 item 63(b)).
(c) in the case of an acting member, the occasion for that member so acting had not arisen or had ceased.