6.—(1) Notices issued under this Order—
(a)must be in writing; and
(b)may be amended or revoked in writing at any time.
(2) Notices whose service on the occupier of any premises results in any requirement or restriction in relation to those premises must contain a description of those premises sufficient to ascertain their extent.
(3) The description referred to in paragraph (2) may be amended by a veterinary inspector if he or she is satisfied that it does not describe a single epidemiological unit in respect of disease.