David Seymour says the Government "must not hesitate" moving to alert level 2 - which he is calling for early next week.
On Saturday, the Ministry of Health announced just one confirmed and one probable case. It follows a declining trend in cases over the past two weeks.
"Significantly, the last three days' test results reflect level 3 conditions. People testing positive yesterday likely felt symptoms on Wednesday or Thursday meaning they contracted the virus at the end of last week under level 3," the ACT leader says in a statement on Saturday.
"There is no plausible reason based on the data to stall the transition to level 2. If anything, it should be brought forward.
"The alternative is that we are stalling because, as with the transition from level 4 to level 3, the country is ready but the Government is not."
Next week the Government will announce if we're loosening restrictions and moving to alert level 2.
Seymour says unless there's a specified uptick in cases over the next three days, level 2 should come into effect this Wednesday, or even earlier.
"Out on the streets, people are organically moving into level 2 anyway, with crowds gathering and chatting outside cafes in a way that the people themselves would have thought irresponsible just 10 days ago," he says.
"The country is ready, but is the Government?"