Up until now, police officers needed to identify themselves prior to using their firearm. For example "Police, stop!"
These rules have now been relaxed by the government, in light of police officers being prosecuted by courts for the illegal deaths of perpetrators. Apparently, this resolution will greatly assist police officers if the have used their weapons during an incident and the case goes to court.
I personally believe that an officer should identify himself before shooting, but the courts here have a tendency to side with the criminal, who ends up as the victim.
Here's a very good report from The Bubble.