; or (B) more than 10 years after the date the judgment for the prior conviction was entered, excluding any period during which the defendant was incarcerated. (4) Upon a showing by the Government that facts regarding prior convictions could not with due diligence be obtained prior to trial or before entry of a plea of guilty, the court may postpone the trial or the taking of the plea of guilty for a reasonable period for the purpose of obtaining those facts. (5) Clerical mistakes in the information, or in the underlying conviction records, may be amended at any time prior to the pronouncement of the sentence. (6) The Government shall bear the burden of proof beyond a reasonable doubt regarding the existence and accuracy of any prior conviction alleged. (7) The person with respect to whom the information was filed may challenge a prior conviction before sentence is imposed. (8) If a prior conviction that was a basis for increased punishment under this part has been vacated in any State or Federal proceeding, or is for an offense that no longer qualifies as a felony drug offense under United States Supreme Court or relevant circuit caselaw, the person shall be resentenced to any sentence available under the law at the time of resentencing, not to exceed the original sentence. . (g) Information filed by United States attorney Paragraph (4) of section 3559(c) of title 18, United States Code, is amended to read as follows: (4) Information filed by United States attorney A person may not be sentenced to increased punishment under this subsection unless, before trial or entry of a guilty plea, the United States Attorney files an information with the court and serves a copy on the person or his counsel stating in writing the previous convictions to be relied upon. . (h) Resentencing Section 3559(c)(7) of title 18, United States Code, is amended by inserting not to exceed the original sentence before the period at the end. 404. Clarification of applicability of the Fair Sentencing Act (a) Defendants previously sentenced