here is what it says on the ASX....under new order typesCentre...

here is what it says on the ASX....under new order types

Centre Point Order?

A Centre Point Order? enables execution at the prevailing midpoint of the best bid and offer of the ASX Central Limit Order Book (CLOB). These anonymous orders transact independently of the CLOB and will only transact with another Centre Point Order?. Once a Centre Point order trades, the trade will be displayed in the trade history window with condition code CX.

link
http://www.asx.com.au/trading_services/new_market_services.htm