Substitution of a public use aerodrome licence for an ordinary aerodrome licence or of an ordinary aerodrome licence for a public use aerodrome licenceU.K.
11. Any person may serve on the Authority an objection to or representation about an application or proposal published pursuant to regulation 10 if—
(a)he does so within 21 days after the date of publication;
(b)he serves a copy of his objection or representation on the applicant and on the holder of the aerodrome licence to which the application or proposal relates within 24 hours after it has been served on the Authority; and
(c)he states the grounds of his objection or representation.