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Re:ARRL Hails FCC Action to Remove Symbol Rate Restrictions by dragontamer on Tuesday November 14, 2023 @10:40PM (#38273046)
[delayed]
Re:ARRL Hails FCC Action to Remove Symbol Rate Restrictions by RF_Savage on Wednesday November 15, 2023 @10:38AM (#38277843)
Depends on the national regulations. "Furthering the art of radio." is mentioned in some of them. So is self-training and experimentation.

That can be low tech or something more modern. Good modern examples are M17, freeDV, NPR-70 and FT8.