5.—(1) Licences granted under this Order—
(a)shall be in writing;
(b)may, in addition to any conditions required by this Order, be made subject to such conditions as the Secretary of State considers necessary to prevent the spread of disease; and
(c)may be amended, suspended or revoked in writing at any time.
(2) Except where otherwise directed by the Secretary of State, a licence granted in Scotland or Wales for the same purpose as a licence which may be granted under this Order is valid for that purpose in England and its conditions apply in England as if it was a licence granted under this Order.
(3) Declarations made under this Order shall be in writing.
(4) Any amendment to or revocation of a declaration shall be made by further declaration.