QUOTE
That's not what it says in the law...
Children who did not immigrate as orphans, but who were adopted by a US citizen parent and obtained lawful permanent resident status also automatically acquire citizenship (so long as they meet all the criteria prior to their 18th birthday).
Unfortunatelly, you (exactly as I did) read interpretation of the law, not the law itself. Even the Department of States website list the requirements as you do. But I wish it were true.
The Child Citizenship Act says the following
---
IN GENERAL- Section 320 of the Immigration and Nationality Act (8 U.S.C. 1431) is amended to read as follows: `children born outside the united states and residing permanently in the united states; conditions under which citizenship automatically acquired `SEC. 320. (a) A child born outside of the United States automatically becomes a citizen of the United States when all of the following conditions have been fulfilled: `(1) At least one parent of the child is a citizen of the United States, whether by birth or naturalization. `(2) The child is under the age of eighteen years. `(3) The child is residing in the United States in the legal and physical custody of the citizen parent pursuant to a lawful admission for permanent residence. `(b.)
Subsection (a) shall apply to a child adopted by a United States citizen parent if the child satisfies the requirements applicable to adopted children under section 101(b.)(1).'.----
Pay attention to Subsection (B.) saying that the Act applies to adopted children IF THE CHILD SATISFIES THE REQUIREMENTS APPLICABLE TO ADOPTED CHILDREN UNDER SECTION 101(b.)(1)
That section 101(b.)(1) requires the child to be in legal custody of adoptive US citizen parent for 2 years....