http://www.legislation.gov.uk/uksi/1996/1243/article/18/made

The National Park Authorities (England) Order 1996

National parks

King's Printer of Acts of Parliament

2015-03-11

COUNTRYSIDE

ENGLAND

Under section 63 of the Environment Act 1995, the Secretary of State may by order establish for a National Park an authority, known as a National Park authority, to carry out in relation to that Park the functions conferred on such an authority by or under Part III of that Act.