Hefty fines for showing indecent images on US TV are having a "chilling effect on creativity," a TV chief has said.
Jackson's "wardrobe malfunction" has gone down in TV history
Fox TV entertainment president Peter Liguori said new rules on decency were "vague" and "difficult to manage".
Last month, US President George Bush signed a law increasing the maximum fine for airing unsuitable material tenfold to $325,000 (£175,000).
"None of our business plans are designed to take on such huge fines," said Mr Liguori.
The Federal Communications Commission (FCC) recently ruled that Fox broke decency standards during the Billboard Music Awards in 2002 and 2003.
On the first occasion, singer Cher used an expletive which the FCC described as "vulgar".
The following year, actress Nicole Ritchie used two swear words which it said were "among the most offensive words in the English language".
The network did not receive a fine, as the FCC felt these were "isolated" occurrences.
Drama series Without A Trace, starring Anthony LaPaglia, received a record fine
But Fox is appealing against the decision in the New York Federal Appeals Court, along with rival broadcasters CBS and NBC, who received similar rulings on foul language.
The FCC has asked the court to delay the hearing and return the cases to them for review.
Fox called the FCC's request an "attempt to delay and possibly evade any judicial review of its new indecency enforcement regime".
US broadcasters have been under pressure to clean up the airwaves since Janet Jackson's breast exposure during a dance routine at the 2004 Super Bowl.
Television network CBS was fined $550,000 (£297,000) for the "wardrobe malfunction".
That figure represented the total sum of fines for individual affiliated stations - each limited to $32,500.
In March this year, the FCC proposed a record fine of $3.6m (£1.9m) for an episode of the missing persons drama Without A Trace.
The penalty, split between 111 affiliates of CBS, was later reduced to $3.3m (£1.8m).
Broadcasters are barred from airing indecent material between 6am and 10pm, although the restrictions do not apply to cable or satellite services.