US laws requiring US citizens to enter the country at designated border crossings
<p>I've been able to find only one law that requires people entering the US to use designated border crossing points, which is <a href="https://www.law.cornell.edu/uscode/text/8/1325" rel="nofollow noreferrer">8 USC 1325</a>.  This law applies only to aliens, however; both relevant subsections of the code begin with "Any alien who...."</p>

<p>Is there a US law that requires US citizens to use designated ports of entry when entering the US?</p>

<p>Is there a law requiring US citizens to present themselves for immigration inspection (or customs inspection) if they cross the border somewhere other than a designated port of entry?</p>

<p><a href="https://www.law.cornell.edu/uscode/text/19/1459" rel="nofollow noreferrer">Yes for individuals,</a> and <a href="https://www.law.cornell.edu/uscode/text/19/1433" rel="nofollow noreferrer">yes for vehicles.</a> They're customs laws rather than immigration laws.</p>

united-states borders