Sec. 95.215  (R/C Rule 15) Do I have to limit the length of my 
          communications?

    (a) You must limit your R/C communications to the minimum practical 
time.
    (b) The only time your R/C communications may be a continuous signal 
for more than 3 minutes is when operation of the device requires at 
least one or more changes during each minute of the communications.
    (c) Your R/C station may transmit a continuous signal without 
modulation only if:
    (1) You are using it to operate a model aircraft device; and
    (2) The presence or absence of the signal operates the device.
    (d) If you show that you need a continuous signal to insure the 
immediate safety of life of property, the FCC may make an exception to 
the limitations in this rule.