Sec. 95.194  (FRS Rule 4) FRS units.

    (a) You may only use an FCC certified FRS unit. (You can identify an 
FCC certified FRS unit by the label placed on it by the manufacturer.)
    (b) You must not make, or have made, any internal modification to an 
FRS unit. Any internal modification cancels the FCC certification and 
voids your authority to operate the unit in the FRS.
    (c) You may not attach any antenna, power amplifier, or other 
apparatus to an FRS unit that has not been FCC certified as part of that 
FRS unit. There are no exceptions to this rule and attaching any such 
apparatus to a FRS unit cancels the FCC certification and voids 
everyone's authority to operate the unit in the FRS.

              Subpart C--Radio Control (R/C) Radio Service

    Source:  48 FR 24890 , June 3, 1983, unless otherwise noted.

                           General Provisions