Exceptions in favour of buses
3. Nothing in paragraph 2 applies to the driver of a bus being used in the provision of a local service who causes the bus to stop within the clearway for so long as may be necessary—
(a)to maintain the published timetable for the service (provided, in the case of a bus stop clearway, the bus is not stopped within the clearway for a period exceeding two minutes);
(b)to enable passengers to board or alight from the bus; or
(c)to enable the crew of the bus to be changed.