Reasonable External Boundary Distance Law and Legal Definition

According to 8 CFR 287.1 [Title 8 Aliens and Nationality; Chapter I Department Of Homeland Security (Immigration and Naturalization); Subchapter B Immigration Regulations; Part 287 Field Officers; Powers and Duties], reasonable external boundary distance means within 100 air miles from any external boundary of the United States or any shorter distance which may be fixed by the chief patrol agent for CBP, or the special agent in charge for ICE, or, so far as the power to board and search aircraft is concerned any distance fixed pursuant to paragraph (b) of this section.

(b) Reasonable distance; fixing by chief patrol agents and special agents in charge. In fixing distances not exceeding 100 air miles pursuant to paragraph (a) of this section, chief patrol agents and special agents in charge shall take into consideration topography, confluence of arteries of transportation leading from external boundaries, density of population, possible inconvenience to the traveling public, types of conveyances used, and reliable information as to movements of persons effecting illegal entry into the United States: Provided, That whenever in the opinion of a chief patrol agent or special agent in charge a distance in his or her sector or district of more than 100 air miles from any external boundary of the United States would because of unusual circumstances be reasonable, such chief patrol agent or special agent in charge shall forward a complete report with respect to the matter to the Commissioner of CBP, or the Assistant Secretary for ICE, as appropriate, who may, if he determines that such action is justified, declare such distance to be reasonable.