In the deal, Khan -- who had faced the prospect of life in prison -- has agreed to be interviewed by government investigators without his own legal counsel present, provided that the government gives his attorney reasonable notice.

CNN: Terror suspect at Guantanamo pleads guilty

The government's lead counsel got exactly 201 words into his argument when the first Justice cut in, asking for a citation.

CNN: Free Speech On The Net At The Supreme Court

"The main issue is making sure that people who interact with consumers actually know what they are talking about, " said Wes Bissett, senior counsel for government affairs to the Independent Insurance Agents and Brokers of America, an industry group that is promoting the restrictions on navigators.

WSJ: Role of Health-Law 'Navigators' Under Fire