The Secretary of Homeland Security shall be charged with the administration and enforcement of this chapter and all other laws relating to the immigration and naturalization of aliens, except insofar as this chapter or such laws relate to the powers, functions, and duties conferred upon the President, Attorney General, the Secretary of State, the officers of the Department of State, or diplomatic or consular officers: Provided, however, That determination and ruling by the Attorney General with respect to all questions of law shall be controlling.

He shall have control, direction, and supervision of all employees and of all the files and records of the Service.

He shall establish such regulations; prescribe such forms of bond, reports, entries, and other papers; issue such instructions; and perform such other acts as he deems necessary for carrying out his authority under the provisions of this chapter.

He may require or authorize any employee of the Service or the Department of Justice to perform or exercise any of the powers, privileges, or duties conferred or imposed by this chapter or regulations issued thereunder upon any other employee of the Service.

He shall have the power and duty to control and guard the boundaries and borders of the United States against the illegal entry of aliens and shall, in his discretion, appoint for that purpose such number of employees of the Service as to him shall appear necessary and proper.

He is authorized to confer or impose upon any employee of the United States, with the consent of the head of the Department or other independent establishment under whose jurisdiction the employee is serving, any of the powers, privileges, or duties conferred or imposed by this chapter or regulations issued thereunder upon officers or employees of the Service.

He may, with the concurrence of the Secretary of State, establish offices of the Service in foreign countries; and, after consultation with the Secretary of State, he may, whenever in his judgment such action may be necessary to accomplish the purposes of this chapter, detail employees of the Service for duty in foreign countries.

After consultation with the Secretary of State, the Attorney General may authorize officers of a foreign country to be stationed at preclearance facilities in the United States for the purpose of ensuring that persons traveling from or through the United States to that foreign country comply with that country’s immigration and related laws.

Those officers may exercise such authority and perform such duties as United States immigration officers are authorized to exercise and perform in that foreign country under reciprocal agreement, and they shall enjoy such reasonable privileges and immunities necessary for the performance of their duties as the government of their country extends to United States immigration officers.

In the event the Attorney General determines that an actual or imminent mass influx of aliens arriving off the coast of the United States, or near a land border, presents urgent circumstances requiring an immediate Federal response, the Attorney General may authorize any State or local law enforcement officer, with the consent of the head of the department, agency, or establishment under whose jurisdiction the individual is serving, to perform or exercise any of the powers, privileges, or duties conferred or imposed by this chapter or regulations issued thereunder upon officers or employees of the Service.

The Attorney General may contract for or buy any interest in land, including temporary use rights, adjacent to or in the vicinity of an international land border when the Attorney General deems the land essential to control and guard the boundaries and borders of the United States against any violation of this chapter.

The Attorney General may contract for or buy any interest in land identified pursuant to paragraph (1) as soon as the lawful owner of that interest fixes a price for it and the Attorney General considers that price to be reasonable.

When the Attorney General and the lawful owner of an interest identified pursuant to paragraph (1) are unable to agree upon a reasonable price, the Attorney General may commence condemnation proceedings pursuant to section 3113 of title 40.

The Attorney General may accept for the United States a gift of any interest in land identified pursuant to paragraph (1).

The Commissioner, in consultation with interested academicians, government agencies, and other parties, shall provide for a system for collection and dissemination, to Congress and the public, of information (not in individually identifiable form) useful in evaluating the social, economic, environmental, and demographic impact of immigration laws.

Such information shall include information on the alien population in the United States, on the rates of naturalization and emigration of resident aliens, on aliens who have been admitted, paroled, or granted asylum, on nonimmigrants in the United States (by occupation, basis for admission, and duration of stay), on aliens who have not been admitted or have been removed from the United States, on the number of applications filed and granted for cancellation of removal, and on the number of aliens estimated to be present unlawfully in the United States in each fiscal year.

Such system shall provide for the collection and dissemination of such information not less often than annually.

The Commissioner shall submit to Congress annually a report which contains a summary of the information collected under subsection (d) and an analysis of trends in immigration and naturalization.

Each annual report shall include information on the number, and rate of denial administratively, of applications for naturalization, for each district office of the Service and by national origin group.