The air law is the same as for all other pilots ;-)
I beg to differ - there are a lot of regs with respect to Permit to Fly aeroplanes and the NPPL which are not covered anywhere in the various JAR air law syllabi. It's not particularly difficult to grasp, but it is different material that is examined in the NPPL(M) ground exams and is important given that a very high proportion of microlight pilots buy their own aeroplanes.
G