The fifth Amended Emergency Declaration is effective from today and allows public gatherings which are limited to 150 people and with social distancing in place.
Businesses can now operate from 5am to 9 pm but must allow just 50 percent of their capacity within the premises.
All schools will remain shut for the next 30 days, with the current school year closed.
Public beaches and parks have reopened for the first time since March.
American Samoa does not have a confirmed case of Covid-19.
The new declaration is in effect until 1 July.