12. Subject to such directions as may be given by the Assembly, a Board may and, if directed by the Assembly, shall —
(a)appoint committees of the Board, or
(b)together with one or more Boards or NHS Trusts or the local authority for the Board’s area, appoint joint committees or sub-committees,
consisting wholly or partly of the members of the Board or other health service bodies or of persons who are not members of the Board or other health service bodies.