2.—(1) Not later than 28 days before—
(a)starting to carry out any tidal works; or
(b)exercising any of the powers of article 9 (power to dredge etc.),
the Council shall submit to the Port Authority plans thereof and such further particulars as may be available to the Council and as the Port Authority may reasonably require and in carrying out such works or in exercising such powers, the Council shall comply with all reasonable modifications and conditions (not involving alteration to the basic design of any tidal works) required by the Port Authority, including protective works.
(2) Any modifications or conditions referred to in sub-paragraph (1) shall be notified by the Port Authority to the Council within 28 days of the receipt by the Port Authority of the plans or particulars to which such modifications or conditions relate.