RSQ, you're right
CARS (Namibian) states the following:
Operation in defined airspace with Reduced Vertical Separation Minima (RVSM)
121.08.43 An operator shall not
operate an aeroplane in defined portions of airspace where, based on Regional Air Navigation Agreement, a vertical separation minimum of 300m (1000ft) applies unless approved to do so by the Director (RVSM Approval)
Semi-circular rule
91.06.33 (1) Unless otherwise directed by an air traffic service unit, the pilot-in-command of an aircraft in level flight, shall fly at an appropriate flight level selected according to magnetic track from the table as prescribed in Document NAM-CATS-OPS 91.
CATS Part 91 It refers to the old semi-cirular rule
