From Longman Business Dictionary
precinctpre·cinct /ˈpriːsɪŋkt/ noun [countableC]1British EnglishBrE an area of a city with many different shops, where cars are not allowedThe hotel is within five minutes of the main shopping precinct.
2American EnglishAmE an area in a city with its own local government, police force etcworking-class black precincts