Semi-Circular Rule

Question 0

All VFR flights flying in a roughly westerly direction (180 - 359 degrees) on magnetic tracks must fly at even or odd flight levels?

Answer 0

Even flight levels
ie. FL045
     FL065
     FL085
Up to FL185

Question 1

VFR flights flying in an easterly direction on magnetic tracks (000 - 179 degrees) must fly at Even or Odd Flight Levels?

Answer 1

Odd Flight Levels
ie. FL035
     FL055
     FL075
Up to FL195