BASIX REQUIRED FOR DEVELOPMENT APPROVAL OF ALL SINGLE DWELLINGS FROM 1 JULY 2004................ BASIX REQUIRED FOR DEVELOPMENT APPROVAL OF ALL FOR MULTI UNIT DWELLINGS FROM 1 OCTOBER 2005...............BASIX REQUIRED FOR DEVELOPMENT APPROVAL OF ALL SINGLE DWELLINGS FROM 1 JULY 2004................ BASIX REQUIRED FOR DEVELOPMENT APPROVAL OF ALL FOR MULTI UNIT DWELLINGS FROM 1 OCTOBER 2005.................