Are you talking about the announcements typically required for public hearings? Because relating such announcements to disclosure is kind of strange. Disclosure

Are you talking about the announcements typically required for public hearings? Because relating such announcements to disclosure is kind of strange. Disclosure is additional information about the message being conveyed, typically relating some bias that the recipient should be aware of before making decisions. Announcements, on the other hand, are precursors to the thing that actually matters, which is the hearing.