<a href="//commons.wikimedia.org/wiki/Category:High_Line_(New_York_City)" title="Category:High Line (New York City)">The High Line</a>,  an elevated garden in Manhattan, has rules for its preservation.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/64771032@N00">Paul Trafford</a>
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/paultraf/8675105204/">Rules for New York High Line</a>