Paragraph 17
The undertaker must repay to the authority all costs, charges and expenses reasonably and properly incurred by the authority—
in constructing any protective work under the provisions of paragraph 4(3)(a) including, in respect of any permanent protective work, a capitalised sum representing the cost of maintaining and renewing those works having set off the amount by which the presence of those works reduces the cost of maintaining and renewing the Canal;
in respect of the employment of any inspectors, watch-guards and other persons whom it is reasonably necessary to appoint for inspecting, watching and lighting any part of the Canal affected by any specified work or protective work and for preventing as far as may be practicable all interference, obstruction, danger or accident arising from the construction, maintenance, renewal, repair or failure of the specified work or any protective work;
in respect of any special navigation or traffic procedures resulting from any restrictions which are necessary as a result of the construction, maintenance, renewal, repair or failure of the specified work and which may in the reasonable opinion of the engineer or harbour master be required to be imposed, or from the suspension of navigation or traffic which may be necessary for the same reasons;
in respect of the approval by the engineer of plans submitted by the undertaker and the supervision by the engineer of any specified work or any protective work; and
in bringing the specified work or any protective work to the notice of users of the Canal.