Exercise of protective and survey powers
41. DLRL shall, so far as is reasonably practicable, so exercise the powers conferred by article 16 (protective works to buildings) as not to obstruct or render less convenient the access to any apparatus.
42. DLRL shall not, in the exercise of the powers conferred by section 11(3) of the 1965 Act, as applied by this Order, or of article 18 (power to survey and investigate land, etc.), make any trial holes which interfere with any apparatus without the consent of the specified undertaker (which shall not be unreasonably withheld).