8(1)The Secretary of State shall appoint one of the Commissioners to be chairman; and if the person so appointed—E+W+S
(a)ceases to be a Commissioner; or
(b)is absent from any meeting,
the Commissioners present at each meeting shall choose a chairman.
(2)The powers of the Commissioners may be exercised at a meeting at which two or more of them are present.
(3)The validity of any proceedings of the Commissioners is not affected by any vacancy among the Commissioners or any defect in the appointment of any Commissioner.