4.—(1) Subject to sub-paragraph 4(2), if as a consequence of the exercise of the powers of this Order access to the apparatus is to be materially obstructed, the undertaker must first give the statutory undertaker 14 days written notice of its intention, and provide such reasonable alternative means of access to such apparatus as will enable the statutory undertaker to operate, maintain, repair or replace, or use the apparatus.
(2) In the event of an emergency, the undertaker is at liberty to access and execute and do all such works and things in, upon or under the Order land if it reasonably considers that immediate measures must be taken. In such circumstances, the undertaker must notify the statutory undertaker as soon as reasonably practicable of such emergency measures and must provide details of the emergency measures and any alternative means of access to the relevant part of the Order land so far as is reasonably safe and practicable.