citizenship of the United States through the parents under

certain conditions:

(1) a child whose parents are lawful permanent residents

becomes a United States citizen-on the date that the last

parent is naturalized before the child's 18th birthday;

(2) a child who has one of the natural parents already a

citizen, and the other natural parent becomes naturalized

before the child's 18th birthday;

(3) a child whose surviving parent, or the parent

exercising legal custody where the parents are legally

separated or divorced, is naturalized before the child's

18th birthday, regardless whether the other parent was or

is an alien; or

(4) an illegitimate child whose mother naturalizes before the

child's 18th birthday and paternity has not been

established.

If only one of the child's parents naturalizes and the

other remains a permanent resident, the child does not derive

citizenship. Instead, the citizen parent may file a separate

Application for Naturalization (N-400) on behalf of the child

if the citizen parent wants the child to become a citizen

before the second parent naturalizes.