12.—(1) A council may appoint a committee, and two or more councils may join in appointing a committee, to advise—
(a)the appointing council or councils; or
(b)where the appointing council or each of the councils operates executive arrangements, any executive of that or those councils, or a sub-committee of that executive,
on any matter relating to the discharge of their functions.
(2) A committee appointed under subsection (1) may—
(a)consist of such persons (whether members of the appointing council or councils or not) appointed for such term as may be determined by the appointing council or councils; and
(b)appoint one or more sub-committees to advise the committee with respect to any such matter.