The US FCC has approved the use of Pactor 4 for US Amateur Radio Operators effective January 8 2024.  The notice is found in the attached URL.  Congratulations to all that worked on getting this approval.

https://www.federalregister.gov/documents/2023/12/07/2023-26770/amateur-radio-service-rules-to-permit-greater-flexibility-in-data-communications