You can certainly be VFR above a solid overcast. This can be done everywhere in the world,
AFAIK.
The problem is whether the pilot's license permits him to fly VFR above a solid overcast. I know of two countries (there may be more) which prohibit this for their own license holders: the UK and South Africa.
The South African restriction is Rules of the Air, not licence privilege:
VISUAL FLIGHT RULES
Visibility and distance from cloud
91.06.21 Every VFR flight shall be so conducted that the aircraft is flown with visual reference to the surface by day and to identifiable objects by night and at no time above more than three eighths of cloud within a radius of five nautical miles of such aircraft ...