Jurisdiction — Territorial — Foreign armed forces — Civil jurisdiction of receiving State — United States forces stationed in Spain — Act of United States serviceman in performance of official duties — Claim brought by private individual for damages arising from act — Treaty of Friendship and Cooperation between Spain and the United States, 1976

State responsibility — Acts and omissions of State organs and officials — Whether receiving State responsible for acts of visiting forces — Conditions for liability — Requirement of direct cause and effect relationship between act or omission and damage suffered — Moral damage caused by disclosure of confidential document sent by United States Naval Hospital to Spanish health authorities — Disclosure of document by local policeman — Whether giving rise to liability of Spanish Ministry of Defence — The law of Spain