For anybody who want to have access to a QR code test poster there is one you can use on this web page at the MoH https://www.health.govt.nz/our-work/diseases-and-conditions/covid-19-novel-coronavirus/covid-19-novel-coronavirus-resources-and-tools/nz-covid-tracer-app/questions-and-answers-nz-covid-tracer
Just scroll down the page