3.—(1) Before beginning any operations for the construction of any specified work (except minor works of maintenance or repair), the Agency must submit to the Harbour Authority plans of the work and such further particulars available to it as the Harbour Authority may within 14 days of the submission of the plans reasonably require.
(2) Any specified work must not be constructed except in accordance with such plans as may be approved in writing by the Harbour Authority or determined to be in accordance with article 68 (arbitration).
(3) Any approval of the Harbour Authority required under this paragraph must not be unreasonably withheld and—
(a)is deemed to be given if it is neither given or refused (with an indication of the grounds for refusal) within 28 days of the later of the submission of the plans or the submission of any further particulars under sub-paragraph (1), and
(b)may be given subject to such reasonable requirements as the Harbour Authority may make for the protection of—
(i)navigation in, or the flow or regime of, the river; or
(ii)the use of its land other than such parts as are required for the specified works for the purposes of performing its statutory functions.