Sec. 95.425  (CB Rule 25) May I make any changes to my CB station 
          transmitter?

    (a) You must not make or have any one else make any internal 
modification to your CB transmitter.
    (b) Internal modification does not include:
    (1) Repair or servicing of a CB station transmitter (see CB Rule 24, 
Sec. 95.424); or
    (2) Changing plug-in modules which were type accepted as part of 
your CB transmitter.
    (c) You must not operate a CB transmitter which has been modified by 
anyone in any way, including modification to operate on unauthorized 
frequencies or with illegal power. (See CB Rules 9 and 11, Secs. 95.409 
and 95.411.)