59Warning devices for indicating temporary obstructions.
Regulations under section 54 of this Act prescribing any type of object or device for warning traffic of a temporary obstruction may include provisions for authorising, subject to such conditions as may be specified in the regulations, persons not otherwise authorised to do so to place an object or device of that type on or near roads or on or near any description of road so specified, in such circumstances and for such periods as may be so specified.