(1)Subject to sections 84A, 84B and 84C of this Act, the authority specified in subsection (2) below may, after giving public notice of their intention to make an order under this subsection as respects any road specified in the notice, make an order prohibiting, either generally or during periods specified in the order, the driving of motor vehicles on that road at a speed exceeding that specified in the order; and while such an order is in force as respects any road, that road shall not be a restricted road for the purposes of section 71 of this Act.
(2)Subject to section 82 of this Act, the authority having power to make an order under subsection (1) above—
(a)as respects a trunk road, shall be the appropriate Minister; and
(b)as respects a road, not being a trunk road, shall be the local authority.
(7)This section does not apply to any part of a special road which is open for use as a special road.