18The holder of a licence in respect of any premises—
(a)granted under paragraph 1 or 4 of this Schedule or,
(b)granted by the Council under the Theatres Act 1843 or the Cinematograph Act 1909.
may at any time apply to the Council for such variations of the terms, conditions or restrictions on or subject to which the licence is held as may be specified in the application ; and, subject to paragraph 19 of this Schedule, on any such application the Council may make such variations in any of those terms, conditions or restrictions, whether or not those specified in the application, as they think appropriate or may refuse the application.