The original post was from someone who claims to live in Alabama. I would suggest he read this.
http://dps.alabama.gov/documents/manuals/cdlmanual.pdfThe chart for whether a CDL is required is copied from the Federal requirements. Incidentally, Georgia uses the same chart. Some states do issue antique vehicle registration, but the use of the the vehicle is very limited. One of the things I have learned in owning a trucking business for 49 years is to read, not listen to what people have to say. And this is my whole point.