Corrections Act 2004, s 129; Corrections Regulations 2005, reg 138
It’s unlikely you’ll be given access to drinking water immediately before being tested, but you shouldn’t be prevented from drinking water if the test isn’t taking place immediately. However, if you’re drinking water when you know you’re getting a urine test, remember that you can be charged with providing a diluted sample.
If you’re unable to provide a sample, or if you spill your sample, you’ll be supervised for up to three hours and provided with no more than 200 ml of water each hour until you provide the sample.
If someone else spills your sample you can’t be required to provide another sample.