Further to Whopity,
VFR (as in the Visual Flight Rules as recommended by ICAO and implemented nationally) has no restriction against operating VFR above clouds (just a cloud clearance and visibility requirement).
As far as I am aware, it is only the UK (for UK CAA NPPL and PPL licences not also holding an IR or IMCr) and South Africa that restricts their PPL's (with out an IR) to having the surface in sight when VFR (and I think South Africa actually defines that as no more than scattered cloud below). Specifically, I have never heard of any Belgian rule that prevent some classes of VFR operation and I can't see any Differences From ICAO Standards with respect to Rules of the Air in GEN 1.7 so would be very surprised if there was such a rule.
So, in general there is no legal restriction against operating on top. However, one typically needs quite a gap to get up or down legally VFR. Also, one needs to have a plan if the gaps close up.
Last edited by mm_flynn; 20th Jul 2013 at 19:35.