47 U.S.C. § 560 : US Code - Section 560: Scrambling of cable channels for nonsubscribers

Search 47 U.S.C. § 560 : US Code - Section 560: Scrambling of cable channels for nonsubscribers

(a) Subscriber request
Upon request by a cable service subscriber, a cable operator
shall, without charge, fully scramble or otherwise fully block the
audio and video programming of each channel carrying such
programming so that one not a subscriber does not receive it.
(b) "Scramble" defined
As used in this section, the term "scramble" means to rearrange
the content of the signal of the programming so that the
programming cannot be viewed or heard in an understandable manner.