to clear all your confusions out
you can fly ONLY 1 circuit in OPRN.
right hand circuits for RWY30 ( north side of the field). no left hand circuit on RWY30 because you would enter the prohibited area which is just south of hte field., even for GA airplanes, no left circuits because you would over fly the air defence command and transport wing HQ of the PAF
NO CIRCUIT FLYING WHEN RWY12 is active. period. you cant fly a right hand circuit on RWY12 because of the prohibited areas. and you cant fly a left hand circuit ( north side of the field) because appraoch side is still 30 and the circle to land is on the north side of the field
that note has nothing to do with the circle to land. its a note telling the ONLY right hand circiuts on RWY30 allowed at the field.