457. (1) Compensation for the purposes of section 456 in the case of the owner of a maritime site shall be calculated as such amount representing the reduction in value as may be agreed or, where not agreed, as determined in accordance with Part 2 of Schedule 6.

(2) In the case of the occupier of a maritime site, the amount of compensation payable is the damage (if any) to his or her trade, business or profession carried out on the site.