Paragraph 25
Deposit under the sea-bed of any substance or article (otherwise than for the purpose of disposal) in connection with the construction or operation of a bored tunnel subject to the conditions—
(a)
that notice of intention to construct the tunnel is first given to the licensing authority; and
(b)
that the approval of the licensing authority is first obtained to the doing of anything which might disturb the marine environment or the living resources which it supports.