(1) Regulations imposing a levy:
(a) may provide different rates (including a zero rate) of the levy for different classes of approved providers; but
(b) must not otherwise discriminate between different approved providers.
(2) Regulations imposing a levy may define what constitutes a class of approved providers for the purposes of the levy, but must not define a class in such a way that the levy would discriminate between States or parts of States.