CBS, which owns 20 TV stations, could face a Federal Communications Commission fine of $550,000 (£294,000), or $27,500 for each of its channels, after the commission was bombarded by more than 500,000 complaints about Jackson's live performance in February.
Lesley Moonves, co-president and co-chief operating officer for parent company Viacom, told the Television Critics Association yesterday that a fine would be "grossly unfair".
He went on to say that the network's practices department that monitor programme content "is being maybe a little tougher especially on things that we feel are gratuitous".
Since the incident, CBS has added a five-second precautionary delay for any live event.
The FCC has stepped up its anti-indecency enforcement and the US Senate and House have gone on record seeking higher penalties for indecency.
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