The Secretary of State may by regulations exempt either wholly or partly from any of the requirements of sections 68 to 77 of this Act-
The Secretary of State may by regulations add to or vary the requirements of the said sections 68 to 77, and require or permit distinctive lamps to be carried displaying lights of such colour and used under such conditions as may be prescribed, in the case of—
and where distinctive lamps are so required or permitted, prohibit similar lamps being carried by any other vehicles.
The Secretary of State may by regulations increase, in relation to vehicles of any class specified in the regulations, the number of tail lamps required by section 68(1)(b) of this Act.
Regulations made under subsection (3) above may make different provision in relation to vehicles of different classes or in relation to vehicles of any class when used in different circumstances; and any such regulations may modify the provisions of section 74 of this Act so far as it relates to the tail lamps of vehicles to which the regulations apply.
The Secretary of State may, notwithstanding anything in section 70 of this Act, by regulations make provision—
Without prejudice to the powers conferred by the foregoing provisions of this section, the Secretary of State may by regulations exempt, either wholly or partly, from the requirements of section 69 of this Act, vehicles of any particular class.
Regulations under any of the provisions of sections 68 to 77 of this Act or this section granting exemptions from any of the requirements thereof—