The OP mentioned quadrantal rule in his question. He must be studying old questions since the UK was the only country where quadrantal rule applied. They have since switched to the semicircular rule in 2015. The quadrantal rule was same altitudes for VFR and IFR, but was mandatory for IFR and recommended for VFR.



I suggest to the OP that he not get ahead of himself and to also get some current material.