Hardly SOP's.
See
Investigation: AO-2013-100 - Weather related operational event involving B737s VH-YIR and VH-VYK at Mildura Airport, Victoria on 18 June 2013
As I said, public safety is a powerful arguement for Australia adopting a SBAS, equivalent to WAAS. It would make a much deeper layer of safety for multiple ops around Australia. It would have assisted significantly in this incident, where minima had to be compromised.