No unlicensed tourist guide for local tours
16.  Where a licensee supplies guiding services in a tour within Singapore and any participant of the tour is a tourist, the licensee must ensure that the guiding services are only provided by —
(a)a tourist guide who holds a valid licence granted or renewed under section 19D(4)(a) of the Singapore Tourism Board Act (Cap. 305B); or
(b)a tourist guide who is exempt from section 19B(1) of the Singapore Tourism Board Act by reason of section 19B(2) of that Act or under section 25C of that Act.