Section 1531(a) of title 18, United States Code, is amended by striking “Any physician who, in or affecting interstate or foreign commerce, knowingly performs a partial-birth abortion and thereby kills a human fetus shall be fined under this title or imprisoned not more than 2 years, or both.” and inserting the following: “Any physician who, in or affecting interstate or foreign commerce, knowingly performs a partial-birth abortion and thereby kills a human fetus shall be imprisoned for any term of years or for life (but in no event for not less than 5 years), may in addition be fined under this title, and shall not be eligible for supervised release.”.