6.—(1) Notices issued under this Order–
(a)shall be in writing; and
(b)may be amended or revoked in writing at any time.
(2) A notice which–
(a)is served on the occupier of premises; and
(b)imposes a requirement or restriction in respect of those premises,
shall contain a description of the premises sufficient to enable the extent of the premises to be ascertained.
(3) Such a description may be amended by a veterinary inspector if the veterinary inspector is satisfied that it does not describe an appropriate area for the purposes of investigating and monitoring the spread of disease in respect of animals which are usually kept together.