EDIT: It appears that the opening poster has departed the scene.
A guide is just that...a guide.
The BCA and AS state the required Standards and regulations.
Your guide states...
This guide is designed to be read in conjunction with trades market workmanship guides in order to help homeowners understand what is considered to be acceptable workmanship and what is defective.
It is designed to bring an understanding before a project begins, so both parties can agree what is to be expected. It is designed to highlight the standard of what should be provided by the successful tradesman and to help homeowners see the value in good workmanship versus poor workmanship.
Your kidding.....right?