22 C.F.R. § 50.2
The Department shall determine claims to United States nationality when made by persons abroad on the basis of an application for registration, for a passport, or for a Consular Report of Birth Abroad of a Citizen of the United States of America. Such determinations of nationality may be made abroad by a consular officer or a designated nationality examiner. A designated nationality examiner may accept and approve/disapprove applications for registration and accept and approve/disapprove applications for passports and issue passports. Under the supervision of a consular officer, designated nationality examiners shall accept, adjudicate, disapprove and provisionally approve applications for the Consular Report of Birth Abroad. A Consular Report of Birth Abroad may only be issued by a consular officer, who will review a designated nationality examiner's provisional approval of an application for such report and issue the report if satisfied that the claim to nationality has been established.
22 C.F.R. §50.2