67.—(1) The Department may give the Authority guidance or directions about the discharge of its functions.
(2) In discharging its functions, the Authority must have regard to any guidance, and comply with any directions, under this section.
(3) Guidance or directions under this section may vary or revoke earlier guidance or directions under this section.
(4) Directions under this section must be in writing.
(5) The Department must publish any direction given under this section.