took the position that the immunity rules of the IOIA and the ESIA were now "link[ed]." Letter from Detlev F. Vagts, Office of the Legal Adviser, to Robert M. Carswell, Jr., Senior Legal Advisor, OAS, p. 2 (Mar. 24, 1977). The Department reaffirmed that view during subsequent administrations, and it has reaffirmed it aga