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.
12. Before the date fixed for the hearing of a case pursuant to regulation 13, the Authority shall serve on any person who has the right to be heard in connection with the case or whom the Authority proposes to hear a copy of, or a summary of, any information in the possession of the Authority which has been provided in connection with the case or which the Authority has reason to believe will be referred to at the hearing of the case:
Provided that before serving such information which has been provided by any other person (not being a person who has provided information in connection with the case but does not wish to be heard), the Authority shall consult that person and shall not serve any information which in its opinion relates to the commercial or financial affairs of the person who has provided it and cannot be disclosed to the prospective recipient without disadvantage to the person who has provided it which, by comparison with the advantage to the public and the prospective recipient of disclosure to him, is unwarranted.