Sorry, I meant they generally have no authority over the content of cable broadcasts because it would violate the first amendment.

Example From the link you posted:

Section 505 states that cable operators or other multichannel video programming distributors who offer sexually explicit programming or other programming that is indecent on any channel(s) primarily dedicated to sexually-oriented programming must fully scramble or block both the audio and video portions of the channels so that someone who does not subscribe to the channel does not receive it. Until a multichannel video distributor complies with this provision, the distributor cannot provide the programming during hours when a significant number of children are likely to view it In 1996, the Commission adopted interim rules to implement Section 505 of the 1996 Act. The interim rules established the hours of 6:00 a.m. to 10:00 p.m. as those hours when a significant number of children are likely to have access to and view the programming. However, before the rules could take effect, Section 505 was challenged in the courts and a federal court in Delaware issued a decision (Playboy Entertainment Group v. U.S.) which determined that Section 505 is unconstitutional