I know there was a discussion about the 6.1 meter stations earlier this year.
That's right. I posted the 6.1 meter control station rule a while back, but I can't find my own message so I'll post it again.
Sec. 90.119 Application requirements.
(b) If the control station(s) will operate on the same frequency as
the mobile station, and if the height of the control station(s)
antenna(s) will not exceed 6.1 meters (20 feet) above ground or an
existing man-made structure (other than an antenna structure), there is
no limit on the number of such stations which may be authorized.
Appropriate items on FCC Form 601 shall be completed showing the
frequency, the station class, the total number of control stations, the
emission, and the output power of the highest powered control station.
Applicants in the 470-512 MHz band must furnish the relevant information
for all control stations.