(a) The district courts shall have original jurisdiction without
regard to amount in controversy of any nonjury civil action against
a foreign state as defined in section 1603(a) of this title as to
any claim for relief in personam with respect to which the foreign
state is not entitled to immunity either under sections 1605-1607
of this title or under any applicable international agreement.
(b) Personal jurisdiction over a foreign state shall exist as to
every claim for relief over which the district courts have
jurisdiction under subsection (a) where service has been made under
section 1608 of this title.
(c) For purposes of subsection (b), an appearance by a foreign
state does not confer personal jurisdiction with respect to any
claim for relief not arising out of any transaction or occurrence
enumerated in sections 1605-1607 of this title.