20.—(1) On receiving an application referred to in regulation 19(1), the determining authority may—
(a)determine the application; or
(b)give directions to the applicant to notify specified persons of the application, and allow them an opportunity to make representations before determining the application.
(2) The determining authority must—
(a)notify the applicant in writing of its decision and the reasons for it;
(b)publish the decision, and the reasons for it, on an appropriate website.