verbalobe wrote:
What on earth is 'Federal common law'?

Should I ask Mario?
Like other common law, it is court-made law. It merely concerns a matter of federal interest, in which the federal courts have the power to make common law. Unlike state courts, federal courts do not have a general power to create common law over any matter where they have jurisdiction to decide a case. These areas would include federal criminal law, admiralty, cases involving the military, and other special federal areas.
Under the
Erie doctrine, there is "no
general federal common law," meaning that when deciding a cause of action based in state law, the federal court must follow the substantive law of the appropriate state's law. This distinction confuses even some attorneys and I am not at all certain even all courts understand it perfectly. It's actually a rather complicated issue.