Surfacing over drainage

[junglejim01]

I'm trying to find out what the regs are for surfacing over drainage. I thought that for certain depths it needed to be concrete. I'm asking because i'm thinking of getting block paving our driveway but want to make sure that i meet regs for drainage.
Drainage is a mixture of clay and poly. The clay is mostly fairly deep but the poly drainage is from soil pipe angles from just below ground level to about 50cm.

Thanks

 

[vincentleonard]

According to me, you certainly need to have a deep concrete layer in order to strengthen the entire surface. If you are still having problem about how its going to complete, then I will advise to hire professional drainage services.