DLRL shall, so far as is reasonably practicable, so exercise the powers conferred by article 16 of this Order as not to obstruct or render less convenient the access to any apparatus.

DLRL shall not, in the exercise of the powers of section 11(3) of the 1965 Act, as applied by this Order, or of article 18 of this Order, make any trial holes which interfere with any apparatus without the consent of the specified undertaker (which shall not be unreasonably withheld).