The following components have been delegated authority under the Immigration and Nationality Act to administer and enforce certain provisions of the Immigration and Nationality Act and all other laws relating to immigration: U.S. Customs and Border Protection (CBP), U.S. Immigration and Customs Enforcement (ICE), and U.S. Citizenship and Immigration Services (USCIS).

Any person desiring information relative to a matter handled by CBP, ICE or USCIS or any person desiring to make a submittal or request in connection with such a matter, should communicate either orally or in writing, with either CBP, ICE or USCIS as appropriate. When the submittal or request consists of a formal application for one of the documents, privileges, or other benefits provided for in the laws administered by CBP, ICE or USCIS or the regulations implementing those laws, follow the instructions on the form as to preparation and place of submission. Individuals can seek service or assistance from CBP, ICE or USCIS by visiting the CBP, ICE or USCIS Web site or calling CBP, ICE or USCIS.

(a) Ports-of-Entry for aliens arriving by vessel or by land transportation. Subject to the limitations prescribed in this paragraph, the following places are hereby designated as Ports-of-Entry for aliens arriving by any means of travel other than aircraft. The designation of such a Port-of-Entry may be withdrawn whenever, in the judgment of the Commissioner, such action is warranted. The ports are listed according to location by districts and are designated either Class A, B, or C. Class A means that the port is a designated Port-of-Entry for all aliens. Class B means that the port is a designated Port-of-Entry for aliens who at the time of applying for admission are exempt from document requirements by § 212.1(c)(5) of this chapter or who are lawfully in possession of valid Permanent Resident Cards, and nonimmigrant aliens who are citizens of Canada or Bermuda or nationals of Mexico and who at the time of applying for admission are lawfully in possession of all valid documents required for admission as set forth in §§ 212.1(a) and (c) and 235.1(d) and (e) of this chapter and are admissible without further arrival documentation or immigration processing. Class C means that the port is a designated Port-of-Entry only for aliens who are arriving in the United States as crewmen as that term is defined in section 101(a)(10) of the Act with respect to vessels.

(b) Ports-of-Entry for aliens arriving by aircraft. In addition to the following international airports which are hereby designated as Ports-of-Entry for aliens arriving by aircraft, other places where permission for certain aircraft to land officially has been given and places where emergency or forced landings are made under part 239 of this chapter shall be regarded as designated for the entry of aliens arriving by such aircraft:

(c) Border patrol sectors. Border Patrol Sector Headquarters and Stations are situated at the following locations:

The regulations of the Department of Homeland Security, published as chapter I of title 8 of the Code of Federal Regulations, contain information which under the provisions of section 552 of title 5 of the United States Code, is required to be published and is subdivided into subchapter A (General Provisions, parts 1 through 3, inclusive), subchapter B (Immigration Regulations, parts 100 through 299, inclusive), and subchapter C (Nationality Regulations, parts 306 through 499, inclusive). Any person desiring information with respect to a particular procedure (other than rule making) under the Immigration and Nationality Act should examine the part or section in chapter I of title 8 of the Code of Federal Regulations dealing with such procedures as well as the section of the Act implemented by such part or section.