Once counties reach certain vaccination thresholds in those designated communities, the case rate may be higher.
For counties to still register the second-most restrictive red tier, for example, they must have no more than seven cases per 100,000 people. A case rate of less than four million per 100,000 people makes that county eligible to go to the orange tier.
But once the residents of those vulnerable communities in the county have been given a dose of two million vaccines, the Red Tier range will increase from four to seven cases per 100,000 people.
What will be allowed to reopen in each tier?
For the most part, the rules for businesses Reopen in each level Will remain the same on 1 April. In the most restricted purple tier, for example, restaurants, museums and gyms will still be allowed to operate only on the street. In the red tier, they will still strictly limit their indoor capacity.
The biggest changes are in the rules for large-scale outdoor events and amusement parks.
Effective April 1, outdoor live events – including music and games – can take place in any county, with seating and other modifications.
In purple-tier counties, those events may hold up to 100 people or fewer, audience members must arrive from within 120 miles, and concessions may not be open. In red-tier counties, audience members are not banned, but events will be capped at 20 percent capacity, with other rules for suites.
In orange and yellow tiers, live events may already be at low capacity.
And amusement parks will still not be able to reopen in purple-tier counties, starting April 1, they can in red-tier counties – at 15 percent capacity and with other modifications, including a weekly worker testing program.