15.—(1) Subject to regulations 17 and 18 an NHS trust may appoint committees of the trust consisting wholly or partly of directors of the trust or wholly of persons who are not directors of the trust.
(2) A committee appointed under this regulation may appoint sub-committees consisting wholly or partly of members of the committee (whether or not they include the directors of the trust) or wholly of persons who are not members of the committee (whether or not they include directors of the trust).