Sec. 1182. Inadmissible aliens

(a) Classes of aliens ineligible for visas or admission Except as otherwise provided in this chapter, aliens who are
inadmissible under the following paragraphs are ineligible to receive visas and ineligible to be admitted to the United States:
(1) Health-related grounds
(A) In general
Any alien -
(iii) who is determined (in accordance with regulations prescribed by the Secretary of Health and Human Services in
consultation with the Attorney General) -
(I) to have a physical or mental disorder and behavior associated with the disorder that may pose, or has posed, a
threat to the property, safety, or welfare of the alien or others, or

(II) to have had a physical or mental disorder and a history of behavior associated with the disorder, which
behavior has posed a threat to the property, safety, or welfare of the alien or others and which behavior is likely
to recur or to lead to other harmful behavior

(2) Criminal and related grounds
(A) Conviction of certain crimes
(i) In general
Except as provided in clause (ii), any alien convicted of, or who admits having committed, or who admits committing acts
which constitute the essential elements of -
(I) a crime involving moral turpitude (other than a purely political offense) or an attempt or conspiracy to commit such a crime, or
is inadmissible.
(ii) Exception
Clause (i)(I) shall not apply to an alien who committed
only one crime if -
(II) the maximum penalty possible for the crime of which the alien was convicted (or which the alien admits having
committed or of which the acts that the alien admits having committed constituted the essential elements) did not
exceed imprisonment for one year and, if the alien was convicted of such crime, the alien was not sentenced to a
term of imprisonment in excess of 6 months (regardless of the extent to which the sentence was ultimately executed).
(B) Multiple criminal convictions
Any alien convicted of 2 or more offenses (other than purely political offenses), regardless of whether the conviction was
in a single trial or whether the offenses arose from a single scheme of misconduct and regardless of whether the offenses
involved moral turpitude, for which the aggregate sentences to confinement were 5 years or more is inadmissible.