§ 240C (8 USC 1230) Records of admission

The Attorney General shall cause to be filed, as a record of admission of each immigrant, the immigrant visa required by section 221(e) of this Act [8 U.S.C 1201(e)] to be surrendered at the port of entry by the arriving alien to an immigration officer.

The Attorney General shall cause to be filed such record of the admission into the United States of each immigrant admitted under section 211(b) of this Act [8 U.S.C 1181(b)] and of each nonimmigrant as the Attorney General deems necessary for the enforcement of the immigration laws.