I'm looking into regulations for small weather balloons.
Does anyone know if I'm correct to interpret FAA FAR part 101 to mean that balloons with payloads lighter than 4 lb are exempt from NOTAM and other permits?

Here's the FAR part 101 I refer to: http://www.ecfr.gov/cgi-bin/text-idx...15.1 &idno=14

Grateful for any help.. US regulations is far from my field.