The Secretary of State may make regulations for any purpose for which regulations may be made under this Part of this Act and for prescribing anything which may be prescribed under this Part of this Act, and otherwise for the purpose of carrying section 4 or this Part of this Act into effect, and in particular, but without prejudice to the generality of the foregoing provisions, may make regulations with respect to—
and different regulations may be made as respects different classes of vehicles or as respects the same class of vehicles in different circumstances.
Regulations made by the Secretary of State under this Part of this Act may—
and nothing in any other provision of section 4 or this Part of this Act shall be construed as prejudicing the generality of the foregoing provisions of this subsection.
Any fee prescribed under this Part of this Act shall be of an amount approved by the Treasury, and different fees may be prescribed for different circumstances.