Section 297(2) (panels to have 3 members, all present) has effect as if for “(all of whom must be present during any proceedings of the panel)” there were substituted“, all of whom must be present during any proceedings of the panel, except where—

(a)

the panel does not hear oral evidence,

(b)

each of the members provides a written opinion, and

(c)

the decision of the panel is unanimous.”