Each neighbourhood is in turn composed of multiple precincts, which are built on the concept of promoting communal exchanges and which are more secure. While older precincts may merely involve dividing rows of identical blocks in relatively close proximity without any other real interaction with each other, newer precincts are designed to physically envelop a common space, or centred around some kind of communal facility such as a multi-storey carpark. While precinct boundaries may be difficult to physically distinguish in older precincts, they are usually obvious in newer precincts through the physical layout of the block and their unique architectural design. Newer precincts (and upgraded older precincts) also often adopt fanciful names reminiscent of private developments to lend an air of class and belonging, although these names are often not used in reality since they are sometimes not displayed and are not part of official addresses.