He could only say "motherfucker" on broadcast TV after 11 pmby Commander Tansin A. Darcos 06/10/2014, 8:44pm PDT
After Bono said "This is fucking brilliant," on the Golden Globes, the FCC went back and revisited its rules. In general, the only time that this particular obscenity is always okay is during the "safe harbor period" which is 11PM to 6AM. The FCC has stated it will not investigate or take action over complaints regarding language or any other material which is not, in and of itself, obscene, for broadcasts occurring between 11PM and 6AM on the grounds that it is unlikely that children will be watching.
So yes, a broadcast station could run the uncut version of Snakes on a Plane or the Al Pacino version of Scarface at any time from 11PM to 6AM and not have to worry about the FCC getting complaints.
Beyond that, there are certain rules about when it's permissible to broadcast material containing obscenities. Generally there is an exemption for news broadcasts (so if a TV station carried a court proceeding live, it would not have to be concerned if such language were used.)
So a TV station could, legally, broadcast a commercial that said "motherfucker" during a program between 11PM and 6AM. Also, the special exception for political ads applies.
A TV station does not have to accept ads for candidates to federal office, which is the Senate, Congress, the President and Vice President. But once a station does so, it must then accept all advertisements from any other candidate to that office, on the same terms, conditions and rates. The station is forbidden to refuse the ad for any reason at all, and cannot edit the ad. In exchange, the station is treated as a common carrier: it has no liability for the content of the advertisement.
Well-known self-admitted "scumbag" Larry Flynt once considered running for president, and he would put explicit sex in his TV commercials since, under federal law, TV stations would be required to run the ads, regardless of content, and cannot refuse to accept them. Even if they were legally obscene. (A court has to make that decision, however.)
Oh, speaking of the Al Pacino version of Scarface, here's the "edited" version.