66.—(1) The undertaker must, before placing any temporary structure or apparatus over the river required in connection with the maintenance or repair or renewal of a specified work, comply with the reasonable requirements of the GYPA, such requirements to include—
(a)the undertaker providing the GYPA with 42 days’ written notice of this requirement so that the GYPA may bring these works to the attention of users of the river; and
(b)receiving approval from the harbour master, but on terms that such approval must not be unreasonably withheld or delayed.
(2) In the case of any work carried out in an emergency the undertaker is only required to give such notice to the harbour master as may be reasonably practicable in the circumstances.