It could also be Part 135 etc. Flight Attendant requirements is based on passenger seats. Pretty much irrespective of which Part under which you operate.
Anyway, the FARs are available online at
www.faa.gov and follow the links. Very handy while killing time at an FBO, I've discovered - I have a Part 135 FAA checkride looming as part of my newly gained employment in the USA so am currently engaged in trying to rapidly assimilate the US way of doing things...
