 Volume 3 - Plumbing & Drainage - including fire fighting, gas, solar water heating, air con & on site waste water systems - for all buildings & external civil works.The NCC is up-graded bi-annually to consider new products, improvements or methods of construction, by senior officials of trade bodies, Institutes of Architects /Engineers / Building Surveyors, state officials & governed by the Australian Building Codes Board (ACBC).The NCC references individual minimum Australian Standards (AS- No.- Year of introduction) for each aspect of the type of contractor's work, or suppliers product, eg the minimum standard for Waterproofing of wet areas uses AS 3740-2004.