Sec. 95.222  (R/C Rule 22) May I make any changes to my R/C station 
          transmitter?

    (a) You must not make or have anyone else make an internal 
modification to your R/C transmitter.
    (b) Internal modification does not include:
    (1) Repair or servicing of an R/C station transmitter (see R/C Rule 
21, Sec. 95.221); or
    (2) Changing plug-in modules which were type-accepted as part of 
your R/C transmitter.
    (c) You must not operate an R/C transmitter which has been modified 
by anyone in any way, including modification to operate on unauthorized 
frequencies or with illegal power. (See R/C Rules 9 and 10, Secs. 95.209 
and 95.210.)