Paragraph 35 I1

The Secretary of State must not provide any illumination or illuminated sign or signal on or in connection with a specified work in the vicinity of any railway belonging to Network Rail unless the Secretary of State has first consulted Network Rail and the Secretary of State must comply with Network Rail’s reasonable requirements for preventing confusion between such illumination or illuminated sign or signal and any railway signal or other light used for controlling, directing or securing the safety of traffic on the railway.