Paragraph 32 Restrictions on the placing of temporary signs
A sign shown in diagram 790 or 7014 may be placed on or near a road only in connection with works involving an alteration in the layout of the carriageway or involving the removal of or a change in the road markings or other traffic signs placed on or near a road or, in the case of the sign shown in diagram 790, at an automatic railway level crossing, and may be retained for not more than 3 months after completion of those works.