Hi Vilas
As per my original post, the direct law in Clean config only applies to some of the aircraft in our fleet I n the range 4200-4800 (these were a block delivered about 5 years ago).
We have BUSS enabled aircraft from MSN approx 2000-6000+ and other than those above, they all go into alternate law with BUSS (until gear down as you would expect).
I think I am right in remembering that the range of MSN which go into Direct Law used to be wider in our fleet (incl. some 5000 series MSN) but it appears to have been changed as part of a mod program- which Mod I don't know.
We also have a 1.8 sim that behaves as GoldenRivett describes (I.e. Direct Law when clean).
I guess the answer is to do whatever ECAM and PFD tell you to do if you end up in BUSS - rather than trying to remember which mod state you have.