In this Part of this Act, the expression " approved duty ", in relation to a member of a body, means any of the following duties, that is to say.—
(a)attendance at a meeting of the body, or of any committee or sub-committee thereof ;
(b)the doing of any other thing approved by the body for the purpose of, or in connection with, the discharge of ' the functions of the body, or of any committee or sub-committee thereof;
(c)attendance as a representative of the body at a conference or meeting convened by one or more bodies to which this Part of this Act applies "or by any association of such bodies, where the body has power, under any statutory provision other than this Act, to defray the expenses incurred in such attendance ; "or
(d)where, in pursuance of a duty imposed on or a power granted to the body by any statutory provision or Royal Charter, he has been appointed by or on the nomination of the body to be a member of any such other body as may be prescribed, not being a body to which this Part of this. Act applies, the doing of anything as a member of that other body for the purpose of the discharge of the functions of that other body:
Provided that paragraph (d) of this section shall not apply where—
(i)the person who is the subject of the appointment is a member of a committee or sub-committee of the body to which this Part of this Act applies by or on whose nomination he was appointed ; and
(ii)it is by reason only of his being a member of such a committee or sub-committee that he is deemed for the purposes of this Part of this Act to be a member of that body.