In Britain, a preservation order is an official order that makes it illegal for anyone to alter or destroy something such as an old building or an area of countryside.
The entire city is under a preservation order.
...a tree preservation order.
preservation order in British English
(ˌprɛzəˈveɪʃən ˈɔːdə)
noun
British
an official order that a particular building, group of buildings, or landscape, must be preserved and maintained in good condition
The entire city is under a preservation order.
a tree preservation order
Examples of 'preservation order' in a sentence
preservation order
No different from the outside anyway; probably a preservation order on it, he reflected.
Fraser, Anthea THE GOSPEL MAKERS (2003)
Now, they were huge, beautiful and established, with a tree preservation order on them.