Jesus, fine, here’s the parts about unmanned balloons since you need explicit instructions.

https://www.faa.gov/air_traffic/publications/atpubs/atc_html...

In aviation, the onus is on you to lookup the right regulations for flight. Ignorance isn’t a valid defence.

You linked to the wrong section (again); that covers how ATC should handle unmanned balloons, not what the balloon operator should do. You probably meant [FAR part 101](https://www.ecfr.gov/current/title-14/chapter-I/subchapter-F...), of which subpart D covers unmanned balloons. But it looks like for anything under 6 lbs, most of the requirements don't apply, except to file NOTAM and notify the nearest ATC when you launch/descend and a few other things.