I don't think that the Covid Act (2020) passes the requirement for public submissions and is therefore not a valid Act. First reading was 12th May, 2020, Royal Assent was the next day.
It also has a rather foul part at 11 (viii) which states that people must;
"report for and undergo a medical examination or testing of any kind, and at any place or time, specified and in any specified way or specified circumstances:"
Which clashes with Clause 11, Right to refuse to undergo medical treatment, of the Bill of Rights (1990) which states that;
"Everyone has the right to refuse to undergo any medical treatment."
And therefore the clash should have been notified by the Attorney General.
It is to me quite clearly not a proper Act of the NZ Parliament.
The dismissal of the Upper House in NZ in the early 1950s may also be a matter of relevance.
Bill of Rights (1990)
https://www.legislation.govt.nz/act/public/1990/0109/latest/DLM224792.html
COVID-19 Public Health Response Act 2020
https://www.legislation.govt.nz/act/public/2020/0012/latest/LMS344177.html
A really shitty part of the New Zealand Covid Act (2020)