If you have an ADLS lease less than 6 years old ( subsequent to the Chch earthquakes ) it’ll have a clause in there, 27.5 I think, saying that if you cannot occupy your building because of a directive from a credible entity ( the government is arguably credible although some might beg to differ ) you are entitled to rent/ lease relief , furthermore there’s usually a sentence in that clause that says if you cannot “fully” use your building you’re entitled to partial relief…..that relief should start at 100% if you cannot access your building at all, and 50% if you cannot “fully” utilize your building due to social spacing or number limits
I hope this helps.
There is a barrister here in Auckland specializing in this matter, if you need his name and number track me down