3.—(1) A notice or declaration under these Regulations shall be in writing, may be subject to conditions and may be amended, suspended or revoked in writing at any time.
(2) A licence under these Regulations shall be in writing, may be subject to conditions and may be either a general licence or a specific licence.
(3) A general licence shall be issued by the publication of it in such manner and to such extent as appears to the Department to be sufficient to bring it to the notice of those persons likely to be affected by it.
(4) The Department may amend, suspend or revoke any licence under these Regulations—
(a)in the case of a general licence, by a notice published so far as is practicable, in the same manner and to the same extent as the licence; and
(b)in the case of a specific licence, by a notice served on the person to whom the licence was issued.
(5) The Department may amend, suspend or revoke a general licence insofar as it applies to any particular person by notice served on that person.
(6) The Department shall take such steps as it considers necessary to ensure that notices or declarations are brought to the attention of those who may be affected by them and, in particular, shall ensure that the extent of any zone declared under these Regulations, the nature of the restrictions and requirements applicable within it and the dates of its declaration and revocation (and any suspension of it) are publicised.