Everyone involved in the FAA regulatory process is saying it is illegal for them to comment.
"The FAA may close an ARAC meeting or a portion of an ARAC meeting only for reasons such
as when information to be discussed—
Is classified or best kept secret in the interests of national defense or foreign policy.
Discloses trade secrets and commercial or financial information obtained from a person that
are privileged and confidential."
Congress has already investigated the FAA over the misuse of secrecy in 2001.
Note: ARAC = Aviation Rulemaking Advisory Committee