4.—(1) Licences granted under these Regulations–
(a)shall be in writing;
(b)may, in addition to any conditions required by these Regulations, be made subject to such conditions as the Scottish Ministers consider necessary to control the disease; and
(c)may be amended, suspended or revoked in writing at any time.
(2) Declarations under these Regulations shall be in writing and may be amended or revoked by further declaration at any time.
(3) Except where otherwise directed by the Scottish Ministers, a licence granted in England or Wales for the same purpose as a licence which may be granted under these Regulations shall be valid for that purpose in Scotland and its conditions shall apply in Scotland as if it was a licence granted under these Regulations.