State immunity — Immunity from attachment — Embassy bank account — Whether funds in such an account automatically covered by immunity — Limitation of immunity to funds specifically allocated for costs and expenses of embassy — Statement of foreign State that accounts exclusively serving diplomatic functions — Statement of private bank that account blocked as guarantee for payment of rent — Inference that account serving diplomatic functions

State immunity — Immunity from execution — Waiver — Requirement that waiver must be express — Whether tacit waiver ever effective — Vienna Convention on Diplomatic Relations, 1961, Article 32(2) — The law of Belgium