3.1.2 Within controlled airspace, ATC may assign and pilots may request a level that does not accord with the tables in Section 5.
3.1.2.1 Pilots must only request a level not conforming to the table of cruising levels when it is determined by the pilot in command to be essential to the safety of the flight and its occupants. In such circumstances, the phrase "DUE OPERATIONAL REQUIREMENT" must be included with the level change request.
3.1.3 ATC will only assign cruising level s not conforming to these tables when traffic or other operational circumstances require.
I hope CASA aren’t subscribed to this channel :-) (Re hemispherical levels and requests for non-standard levels)