Regulation 21 Requirement for writing and delivery

All notices, applications, appeals, objections or other representations as respects which provision is made in these Regulations shall, save where otherwise provided, be in writing and, in the case of a notice given by the commissioner to the holder of, or applicant for, a licence, shall be left at, or sent by the recorded delivery service to, the address last notified to him by the holder or applicant for the purpose of the licence or application (as the case may be).