Sec. 15.21  Information to user.

    The users manual or instruction manual for an intentional or 
unintentional radiator shall caution the user that changes or 
modifications not expressly approved by the party responsible for 
compliance could void the user's authority to operate the equipment. In 
cases where the manual is provided only in a form other than paper, such 
as on a computer disk or over the Internet, the information required by 
this section may be included in the manual in that alternative form, 
provided the user can reasonably be expected to have the capability to 
access information in that form.

[ 54 FR 17714 , Apr. 25, 1989, as amended at  68 FR 68545 , Dec. 9, 2003]