Hello, I'm trying to find a regulatory reference that enables ATC to cancel the limit of 250 KIAS below 10,000'.
Thus far, I've found:
Manual of Standards Part 172—Air Traffic Services
10.1.4 Relaxation of Speed Restrictions
10.1.4.1 Subject to subsection 10.1.4.2, in providing an air traffic service in Class D airspace, including a Class D CTR, ATC may permit an aircraft to exceed the 200 KT Class D airspace speed limit.
Note The 200 KT speed limit for Class D airspace is a CASA direction to pilots under subregulation 99AA (5) of the Civil Aviation Regulations 1988.
10.1.4.2 After taking account of air traffic conditions, ATC may permit:
(a) a maximum speed limit of 250 KT; or
(b) if the pilot in command of an aircraft informs ATC that a speed greater than 250 KT is an operational requirement — a maximum speed limit of greater than 250 KT.
But this seems to indicate that it is the PIC that must request it as an operational requirement - not that ATC can request/provide it.
Don't get me wrong - I want to be able to keep doing this!
