61.—(1) Before commencing construction of a specified work, the undertaker must submit to the drainage authority plans of the specified work and such further particulars available to it as the drainage authority may reasonably require within 14 days of the submission of the plans.
(2) A specified work must not be constructed except in accordance with such plans as may be approved in writing by the drainage authority or determined under paragraph 67.
(3) Any approval of the drainage authority required under this paragraph—
(a)must not be unreasonably withheld or delayed;
(b)is deemed to have been given if it is neither given nor refused within 28 days of the submission of the plans for approval, or submission of further particulars (where required by the drainage authority under sub-paragraph (1)) whichever is the later; and
(c)may be given subject to such reasonable requirements as the drainage authority may make for the protection of any drainage work taking into account the terms of this Order.
(4) Any refusal under this paragraph must be accompanied by a statement of the reasons for refusal.