Section 1145(b) of the Social Security Act (
42 U.S.C. 1320b–15(b)) is amended by striking “any obligation subject to the public debt limit established under section 3101 of title 31, United States Code” and inserting “any obligation issued under chapter 31 of title 31, United States Code, and any obligation whose principal and interest are guaranteed by the United States Government (except guaranteed obligations held by the Secretary of the Treasury)”.