No regulatory would provide a single sentence answer and certainly wouldn't provide that answer over the phone. The regulatory would be acting as an agent of the United States and any statement would have vast legal implications. It could allow future lawsuits against the federal government or provide protection for a business in the event the federal government sought legal action. It could even rise to criminal entrapment.
The government is allowed to lie to you under color of authority and claim "qualified immunity" to do so with impunity. Especially when it involves conduct you know to be legal, and which they claim to be illegal, by using "underground regulations".