Under NCC 2019, common area of Class 2 buildings, Class 3, Class 5, Class 6, Class 7, Class 8 and Class 9 buildings can use JV3 alternative solution for energy compliance.

Under NCC 2022 (with a transition period from 1 May to 1 October 2023 in Victoria), Class 2 buildings are also able to use JV3 method to achieve a cost-effective compliance