ARRL has already amended their filing (thanks, Andy). http://apps.fcc.gov/ecfs/comment/view?id=6017478079 It has removed the encryption clause that was put into 97.307(f)(3) in the original petition. So, we can just focus on the remaining part of 97.307(f)(3) now: i.e., (1) removal of symbol rate and (2) the 2,8 kHz bandwidth. 73 Chen, W7AY