Karting Australia have released a notification indicating that the 2016 Specification motors and tyres can be used immediately.
http://www.karting.net.au/information-on-use-of-new-engines-and-tyres
If you do wish to use the new (2016 specification) Engines and/or Tyres on the track, please ensure you comply with the relevant Class rules as outlines in the 2016 Karting Manual.
http://www.karting.net.au/media/rules/2016/2016 KA Manual Final 17 Nov 2015.pdf