National's South Island MPs have joined forces to ask Prime Minister Jacinda Ardern to explain why the island is at Covid-19 alert level 2.
There has not been a case of the pandemic disease in the South Island for almost a year, although several clusters from the first wave of the disease originated in the South.
The current outbreak is of the highly transmissible Delta strain of the coronavirus, and Ardern has previously said the level 2 restriction was in place to keep the South Island safe.