Paragraph 23
(1)
The undertaker must not, except with the consent of the relevant highway authority,—
(a)
deposit any soil or materials, or stand any plant, on or over any highway so as to obstruct or render less safe the use of the highway by any person; or
(b)
deposit any soil or materials on any highway outside a hoarding.
(2)
If within 28 days after request for it the consent of the relevant highway authority is neither given nor refused, it is deemed to have been given.
(3)
The expense reasonably incurred by the relevant highway authority in removing any soil or materials deposited on any highway in contravention of this paragraph must be paid to the relevant highway authority by the undertaker.