15(1)Nothing in the preceding provisions of this code shall authorise the doing of anything inside a relevant conduit without the agreement of the authority with control of that conduit.
(2)The agreement of the authority with control of a public sewer shall be sufficient in all cases to confer a right falling within any of the preceding provisions of this code where the right is to be exercised wholly inside that sewer.
(3)In this paragraph—
(a)" relevant conduit " and " public sewer " have the same meanings as in section 98 of this Act; and
(b)a reference to the authority with control of a relevant conduit shall be construed in accordance with subsections (7) and (8) of that section.