CBS scored another legal victory in its long-running fight with the Federal Communications Commission over Janet Jackson’s “wardrobe malfunction” during a Super Bowl halftime show.

A three-judge panel of the U.S. 3rd Circuit Court of Appeals in Philadelphia upheld its earlier ruling that the FCC’s indecency fine of $500,000 against the network was invalid.

At issue is the procedural process the regulatory agency used to fine CBS for the 2004 halftime show in which Justin Timberlake tore off a piece of Janet Jackson’s clothing, exposing her breast for a few seconds to an audience of about 90 million. Jackson later attributed the incident to a “wardrobe malfunction,” a phrase that became part of the lexicon. The court ruled that the FCC’s fine represented an undisclosed change in the enforcement of its indecency policy with regard to “fleeting images” and hence could not be enforced.

“We again set forth our reasoning and conclusion that the FCC failed to acknowledge that its order in this case reflected a policy change and improperly imposed a penalty on CBS for violating a previously unannounced policy,” the court said.

The FCC said in a statement that while it was disappointed by the decision, it was pleased that the court “did not question the FCC’s statutory responsibility to regulate indecent broadcasting” and added that the agency would “continue to use all of the authority at its disposal to ensure that the nation’s broadcasters fulfill the public interest responsibilities that accompany their use of the public airwaves.”

“We are gratified that once again the court has ruled in our favor. We are hopeful that this will help lead the FCC to return to the policy of restrained indecency enforcement it followed for decades,” CBS said in a statement.

It is unclear whether the FCC will appeal the ruling to either the full 3rd Circuit or to the Supreme Court, both of which are options. A spokesman for the FCC referred calls to the Department of Justice and a spokesman there said the matter was under review.

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