What does “Private Military Activity” even mean?
I suspect it refers to private militias not under the control of a state government or the federal government.
https://www.congress.gov/118/bills/s3589/BILLS-118s3589is.xml#H75249E0730824054A1BF9B33B5A5A171
Here is the Bill text. I think they are worried about citizen arrests or reprisals.