I can't recall whether this data has been posted yet or not; sorry if its a repeat.
From the Jepp 10-9 Airport/Info dated 24 Feb 06: Runway 30 right-hand circuit.
From the Jepp 11-1 ILS DME Rwy 30 dated 23 May 03: No restrictions shown for circling pattern. Straight in mins of 1965' (309')/800m with ALS. Circling mins at 135 kts of 2410' (742')/1600m and 180 kts of 2510' (842')/2400m.
There is the prohibited area due south of the airport, plus a note on the 11-1 to avoid overflight of the city south and west. Certainly casts doubt on the right-hand circuit.
Best,
GC