15.— (1) Subject to subsection (2), the holder of a licence must commence the public bus passenger service within 4 months of the date on which the licence in respect of the service was granted or amended by the Authority.

(2) The Authority may at the request of the licence holder and having satisfied itself as to the validity of the reasons for the request, extend the period referred to in subsection (1) to a date that it shall determine and shall advise the applicant accordingly.

(3) The licence holder shall provide confirmation to the Authority of the commencement of a public bus passenger service within the period set out in subsection (1) or determined under subsection (2).

(4) Where a licence holder fails to comply with the requirement set out in subsection (3), or where the Authority becomes aware of the fact that a public bus passenger service has not been commenced by the appropriate date, it shall notify the licence holder that the licence will be revoked on a date that is 14 days following that notification unless the licence holder provides proof of the commencement of the service before that date.