uhf frequencies.

I work for boeing in wichita ks. As an electrician here, I have noticed a lot of radio control transmitters used on cranes using ham frequencies.
The frequency management group here says they are covered by part 19 fcc regs as low power devices.
The mfgr of the radios also says they are c overed under part 19. I have not been able to get a copy of part 19 from the fcc.
cliff WA0ROX