The FAA has given the Northeast Region Unmanned Aircraft Systems Unit (linked to the Grand Forks, North Dakota County Sheriff’s Office) permission to fly at night anywhere in the United States. According to Part 107 night flight is not allowed, unless a person/organization applies for a special exemption with the FAA. The Grand Forks Sheriff’s office applied for the exemption 6 months ago and was finally approved after repeated talks with the FAA
The Duluth New Tribune reported that the Northeast Region Unmanned Aircraft Systems Unit already had permission to fly in 18 counties in North Dakota and has built up night flying experience it wants to make available to other authorities throughout the nation.
The FAA has given other night flight exemptions, most notably to Intel for filming a per-taped drone formation flight for the Super Bowl.
If a person/organization is planning on drone use cases beyond the rules of Part 107, you need to apply for a special exemption with the FAA. Luckily, this process is much easier than the 333 exemption that was needed before Part 107 past. For more information please visit the FAA page on Part 107 exemptions.