在第三國執行J-1兩年條款 - 移民

在國務院的問與答裡面(網址:http://goo.gl/sNe2zQ )
有一個說法是可以在美國或第三國執行兩年條款
看起來似乎是waiver 的一種，

1. 請問有人知道這是歸在哪一種Waiver Categories嗎?
會這樣問是因為一種categories 只能申請一次waiver

2. 根據下面的說法， we require a written statement from an official
of your home government (through the home country's embassy in Washington, DC)
that you were or will be serving in the United States or a third country.
似乎不只可以說過去兩年在第三國為台灣政府工作，也可以說是未來即將在第三國
為台灣政府工作。 請問是這樣嗎?

3. 看起來這個條款是要由出no objetion letter 的單位(台北經濟文化代表處)出信
請問有人申請過嗎? 跟申請no objection letter 是同一個負責人嗎?

謝謝大家，以下附上這個問與答的原文
Q:
Can I serve my two-year home-country physical presence requirement
in the U.S. or a third country?

A:
The period of time you spend in the United States or a third country after
your exchange visitor program has ended may count toward fulfillment of the
two-year home-country physical presence requirement, if you are employed by
your home country’s government, in its military service, or in its career
foreign service and you are serving in a country other than your home country
at the behest of your home country’s government. Before the Waiver Review
Division can determine whether you have satisfied the physical presence
requirement, we require a written statement from an official of your home
government (through the home country's embassy in Washington, DC) that you
were or will be serving in the United States or a third country in the
service of your home country and at that government's request.


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