Opinion of Thomas, J.
process by which that citizenship is evidenced has varied over time. Under the 1870 consular regulations, for instance, children born abroad to U. S. citizens were issued no certificates. If they applied for a U. S. passport, then they were issued one “qualified by the obligations and duties” that attached to those citizens by virtue of their residence in a foreign nation. Regulations Prescribed for the Use of the Consular Service of the United States, App. No. IV, p. 288 (1870); see also id., § 109, at 38 39. Congress acted in 1907 to require children residing abroad to register with their local consulate at the age of 18. Act of Mar. 2, 1907, § 6, 34 Stat. 1229. Because of the importance of this registration requirement, consular officials began to issue reports to citizens confirming their registration. See generally National Archives, General Records of the Dept. of State, Record Group 59, Passport Office, Decimal File, 1910–1949.
In 1919, the Department of State acted to standardize the consular registration of children born abroad. Report of Birth of Children to American Citizens Residing Abroad, General Instruction No. 652. It urged consulates to impress upon U. S. citizens abroad the need to record the birth of their children within two years. Id., at 2. To encourage that effort, the Department permitted consular officials to issue reports attesting that the parents of U. S. citizens born abroad had presented sufficient evidence of citizenship for their children. Ibid.
The 1960's brought additional regulations of consular reports of birth abroad, 31 Fed. Reg. 13538 (1966), which continue in a substantially similar form to this day. See 22 CFR §§ 50.5, 50.7 (2014). As currently issued, the consular report of birth abroad includes the applicant's name, sex,
of this citizenship uncertain. Binney, The Alienigenae of the United States, 2 Am. L. Reg. 193 (1854). But Congress acted to clarify the availability of such citizenship in 1855, Act of Feb. 10, 1855, ch. 71, 10 Stat. 604, and it continues to exist to this day, see Immigration and Nationality Act, § 301(a), 66 Stat. 235.
