54.— No action or other proceedings shall lie or be maintainable (except in the case of wilful neglect or default) against—

(a) a member of the Authority or a member of the staff of the Authority,

(b) a person authorised by the Authority under section F49[51(2),]

(c) a person engaged by the Authority under section 53, or

(d) a person made available to the Authority under section 61,

arising from a failure to perform or to comply with any of the functions conferred or obligations imposed on the Authority by or under this Chapter.