Paragraph 21 Flight in notified airspace

Subject to rule 21A of these Rules, in relation to flights in Visual Meteorological Conditions in controlled airspace notified for the purposes of this rule, the commander of an aircraft shall comply with rules 27 and 28 of these Rules as if the flights were IFR flights:

Provided that the commander of the aircraft shall not elect to continue the flight in compliance with the Visual Flight Rules for the purposes of rule 27(3).