Double insurance means that an "exemption from confiscation" announcement was published in the Federal Register guaranteeing that the objects would be free from legal harassment during their stay in United States, an undertaking ratified by the R.O.C.
所謂雙重保險，首先由美方在「聯邦公報」上刊明「免於扣押」公告，提供文物在美展出期間免受司法干預的保證，並經我國行政院核准，產生正式的法律效用。