http://www.legislation.gov.uk/uksi/1991/476/article/2/made

The Litter (Relevant Land of Principal Litter Authorities and Relevant Crown Land) Order 1991

Local Government

King's Printer of Acts of Parliament

2011-07-04

ENVIRONMENTAL PROTECTION

This Order is made under section 86(8) of the Environmental Protection Act 1990, which empowers the Secretary of State to designate descriptions of land which are not to be treated as relevant land for the purposes of Part IV of that Act (Litter etc.) The Order designates land below the place to which the tide flows at mean high water spring tide as land which is not relevant land of principal litter authorities or relevant Crown land.