16. Any consent of the Trust required under paragraph 15 must not be unreasonably withheld and—
(a)is deemed to have been given if it is neither given nor refused within 28 days of the submission of the request for it; and
(b)may be given subject to such reasonable requirements as the Trust may make—
(i)in the case of a deposit, so as to ensure that the use of the canal is not obstructed or rendered less safe, and
(ii)in the case of a discharge, concerning the reimbursement by the Company of expenses incurred by the Trust in disposing of the water so discharged, being expenses which the Trust would not have incurred but for the discharge.