regulationzone
nounUK /ˌreɡjʊˈleɪʃən zəʊn/
US /ˌreɡjəˈleɪʃən zoʊn/
A regulation zone is a special area where there are extra rules to keep people safe.
The park is a regulation zone, so you must keep your dog on a leash.
OTHER MEANINGS
2. An area in a city where building and land use follow strict official rules.
New shops cannot open in the regulation zone without a permit.
3. A part of a game or sport where special rules apply to all players.
Players must stay inside the regulation zone during the match.
4. A section of a factory or lab where safety rules are very strict.
Wear goggles when you enter the regulation zone.