Where it appears to a local authority that two or more different sites, when considered together, are in such a condition, by reason of substances in, on or under the land, that—
this Part shall apply in relation to each of those sites, whether or not the condition of the land at any of them, when considered alone, appears to the authority to be such that significant harm, or significant pollution of controlled waters, is being caused, or there is a significant possibility of such harm or pollution being caused.
Where it appears to a local authority that any land outside, but adjoining or adjacent to, its area is in such a condition, by reason of substances in, on or under the land, that significant harm, or significant pollution of controlled waters, is being caused, or there is a significant possibility of such harm or pollution being caused within its area—
shall be construed accordingly;
but this subsection is without prejudice to the functions of the local authority in whose area the land is in fact situated.
A person acting in a relevant capacity—
In subsection (3) above, "person acting in a relevant capacity" means—
Regulations may make different provision for different cases or circumstances.