1. Before granting a street works licence the street authority shall give not less than 10 working days' notice to each of the following—
(a)where the works are likely to affect a public sewer, to the Department,
(b)where the works are to be executed in a part of a street which is carried or crossed by a bridge vested in a transport authority, or crosses or is crossed by any other property held or used for the pruposes of a transport authority, to that authority,
(c)where in any other case the part of the street in which the works are to be executed is carried or crossed by a bridge, to the bridge authority,
(d)to any person who has given notice under Article 14 (advance notice of certain works) of his intention to execute streets works which are likely to be affected by the works to which the licence relates, and
(e)to any other person having apparatus in the street which is likely to be affected by the works;
but a failure to do so does not affect the validity of the licence.