(1)A local authority, or an officer of an authority, subject to a direction or instruction under this Part must comply with it.
(2)This includes a direction or an instruction to exercise a function that is contingent upon the opinion of the local authority or an officer of the authority.
(3)A direction under this Part—
(a)must be in writing;
(b)may be varied or revoked by a later direction;
(c)is enforceable by mandatory order on application by, or on behalf of, the Welsh Ministers.