Maryland counties had already announced similar orders requiring face-coverings.
Black residents made up nearly 50 percent of patients whose race was recorded.
The designation means the county needs “urgent federal attention,” Gov. Larry Hogan said.
Urbanski murdered 2nd Lt. Richard Collins in 2017.
The order takes effect at 8 p.m. Monday night.
The order is effective at 5 p.m. Monday.
In a sprint session, the General Assembly approved legislation to aid with coronavirus response, make hate crimes easier to prosecute, require University System of Maryland institutions to create outbreak response laws, and more.
Campuses should remain open, he said.
The man was in his 60s and had an underlying medical condition.
The bill still requires Gov. Larry Hogan's signature.