You're right. They were looking for something like breath testing for alcohol. You can see that in the bill history.
On legislation.govt.nz, you can see the legislative history under the "View whole" tab.
Legislative history
- 30 July 2020: Introduction (Bill 317–1)
- 4 August 2020: First reading and referral to Transport and Infrastructure Committee
- 17 June 2021: Reported from Transport and Infrastructure Committee (Bill 317–2)
- 11 August 2021: Second reading
- 16 February 2022: Committee of the whole House (Bill 317–3)
- 8 March 2022: Third reading
- 11 March 2022: Royal assent
If you go back through all the versions and amendments, you can see they originally tried to introduce a saliva test. The transport minister then recommended blood tests. One could speculate that was due to research and submissions.
Committee of the Whole House included amendments to use saliva only as an indicator of use, while relying on blood tests to measure levels. This enables officers to administer compulsory road-side oral swabs as a precursor to taking someone in for a blood test.
Section 71A "Who must undergo first oral fluid test", which includes "a driver of, or a person attempting to drive, a motor vehicle on a road". This enables random roadside testing without a specific reason. This was acknowledged as a violation of NZBORA which was deemed in the public interest by the Land Transport Act 1998.
So, if you drive a car in any mental state, get ready for the cops to stick stuff in your mouth.
It's only fair to mention that I took the bite out of the pizza. It didn't come that way.
I am mostly just surprised at how few mushrooms there are.