3.—(1) The undertaker may construct and maintain the scheduled works.
(2) The undertaker may retain and maintain the existing mast.
(3) Subject to article 4 the scheduled works shall be constructed and maintained in the lines or situations shown on the works plans and in accordance with the levels shown on the sections.
(4) The undertaker may, within the limits of deviation for the scheduled works, carry out, provide and maintain such of the following works and facilities as may be necessary or expedient for the purposes of, in connection with, or in consequence of, the construction, maintenance or operation of the scheduled works, namely—
(a)temporary or permanent landing places, jetties, or moorings or other means of accommodating vessels in the construction and maintenance of the scheduled works;
(b)buoys, beacons, fenders and other navigational warning or ship impact protection works;
(c)scour protection works; and
(d)such other works, apparatus, plant and machinery of whatever description as may be ncessary or expedient.