For children born abroad, a Consular Report of Birth Abroad may be requested to confirm entitlement as a national. Section 301(c) of the Nationality Act of 1952 extends automatic nationality at birth to children born abroad to two parents who are U.S. nationals, as long as one of the parents resided for any length of time in the United States or its possessions. Section 301(g) establishes that to attain automatic nationality for a child born abroad to a citizen and a foreign national, residency in the United States or its possessions is also required. Time served as active military service was considered equivalent to residence in the U.S. For children with one national parent, requirements vary, depending on when they were born, and whether the parents were married.