The Secretary of State may make regulations as to the use on roads of cycles, not being motor vehicles, their construction and equipment and the conditions under which they may be so used and, in particular, but without prejudice to the generality of the foregoing provision, as to—
Regulations under this section may provide for repealing byelaws dealing with the same subject matter as the regulations, and for suspending while the regulations remain in force any power of making such byelaws.
Regulations under this section may be made so as to apply either generally or in such circumstances only as may be specified in the regulations.
Regulations under this section as to the use on roads of cycles may prohibit the sale or supply, or the offer of a sale or supply, of a cycle for delivery in such a condition that the use thereof on a road in that condition would be a contravention of the regulations, but no provision made by virtue of this subsection shall affect the validity of any contract or any rights arising under a contract.
If a person sells, supplies or offers to sell or supply a cycle in contravention of any prohibition imposed by regulations made by virtue of subsection (4) above he shall be guilty of an offence, unless he proves—