Final (Decision) RIS This Final (Decision) Regulation Impact Statement (RIS) considers scalding injuries and fatalities under the current inconsistent application of the requirements for tempering heated water delivery at the time of replacing water heaters in existing private residences in Australia. The analysis reveals that the costs of consistent application of tempering heated water supply would exceed the benefits and therefore concludes in favour of the status quo. At its meeting in November 2017, the Board noted that the States and Territories would continue to work towards national harmonisation having regard to a 5-year phase in period for those jurisdictions that currently don’t require temperature control in existing dwellings.