Section 400.20 - Procedure for determining whether defendant should be sentenced as a persistent felony offender1. Applicability. The provisions of this section govern the procedure that must be followed in order to impose the persistent felony offender sentence authorized by subdivision two of section 70.10 of the penal law. Such sentence may not be imposed unless, based upon evidence in the record of a hearing held pursuant to this section, the court (a) has found that the defendant is a persistent felony offender as defined in subdivision one of section 70.10 of the penal law, and (b) is of the opinion that the history and character of the defendant and the nature and circumstances of his criminal conduct are such that extended incarceration and lifetime supervision of the defendant are warranted to best serve the public interest.2. Authorization for hearing. When information available to the court prior to sentencing indicates that the defendant is a persistent felony offender, and when, in the opinion of the court, the available information shows that a persistent felony offender sentence may be warranted, the court may order a hearing to determine (a) whether the defendant is in fact a persistent felony offender, and (b) if so, whether a persistent felony offender sentence should be imposed.3. Order directing a hearing. An order directing a hearing to determine whether the defendant should be sentenced as a persistent felony offender must be filed with the clerk of the court and must specify a date for the hearing not less than twenty days from the date the order is filed. The court must annex to and file with the order a statement setting forth the following: (a) The dates and places of the previous convictions which render the defendant a persistent felony offender as defined in subdivision one of section 70.10 of the penal law; and(b) The factors in the defendant's background and prior criminal conduct which the court deems relevant for the purpose of sentencing the defendant as a persistent felony offender.4. Notice of hearing. Upon receipt of the order and statement of the court, the clerk of the court must send a notice of hearing to the defendant, his counsel and the district attorney. Such notice must specify the time and place of the hearing and the fact that the purpose of the hearing is to determine whether or not the defendant should be sentenced as a persistent felony offender. Each notice required to be sent hereunder must be accompanied by a copy of the statement of the court.5. Burden and standard of proof; evidence. Upon any hearing held pursuant to this section the burden of proof is upon the people. A finding that the defendant is a persistent felony offender, as defined in subdivision one of section 70.10 of the penal law, must be based upon proof beyond a reasonable doubt by evidence admissible under the rules applicable to the trial of the issue of guilt. Matters pertaining to the defendant's history and character and the nature and circumstances of his criminal conduct may be established by any relevant evidence, not legally privileged, regardless of admissibility under the exclusionary rules of evidence, and the standard of proof with respect to such matters shall be a preponderance of the evidence.6. Constitutionality of prior convictions. A previous conviction in this or any other jurisdiction which was obtained in violation of the rights of the defendant under the applicable provisions of the Constitution of the United States may not be counted in determining whether the defendant is a persistent felony offender. The defendant may, at any time during the course of the hearing hereunder controvert an allegation with respect to such conviction in the statement of the court on the grounds that the conviction was unconstitutionally obtained. Failure to challenge the previous conviction in the manner provided herein constitutes a waiver on the part of the defendant of any allegation of unconstitutionality unless good cause be shown for such failure to make timely challenge.7. Preliminary examination. When the defendant appears for the hearing the court must ask him whether he wishes to controvert any allegation made in the statement prepared by the court, and whether he wishes to present evidence on the issue of whether he is a persistent felony offender or on the question of his background and criminal conduct. If the defendant wishes to controvert any allegation in the statement of the court, he must specify the particular allegation or allegations he wishes to controvert. If he wishes to present evidence in his own behalf, he must specify the nature of such evidence. Uncontroverted allegations in the statement of the court are deemed evidence in the record.8. Cases where further hearing is not required. Where the uncontroverted allegations in the statement of the court are sufficient to support a finding that the defendant is a persistent felony offender and the court is satisfied that (a) the uncontroverted allegations with respect to the defendant's background and the nature of his prior criminal conduct warrant sentencing the defendant as a persistent felony offender, and (b) the defendant either has no relevant evidence to present or the facts which could be established through the evidence offered by the defendant would not affect the court's decision, the court may enter a finding that the defendant is a persistent felony offender and sentence him in accordance with the provisions of subdivision two of section 70.10 of the penal law.9. Cases where further hearing is required. Where the defendant controverts an allegation in the statement of the court and the uncontroverted allegations in such statement are not sufficient to support a finding that the defendant is a persistent felony offender as defined in subdivision one of section 70.10 of the penal law, or where the uncontroverted allegations with respect to the defendant's history and the nature of his prior criminal conduct do not warrant sentencing him as a persistent felony offender, or where the defendant has offered to present evidence to establish facts that would affect the court's decision on the question of whether a persistent felony offender sentence is warranted, the court may fix a date for a further hearing. Such hearing shall be before the court without a jury and either party may introduce evidence with respect to the controverted allegations or any other matter relevant to the issue of whether or not the defendant should be sentenced as a persistent felony offender. At the conclusion of the hearing the court must make a finding as to whether or not the defendant is a persistent felony offender and, upon a finding that he is such, must then make such findings of fact as it deems relevant to the question of whether a persistent felony offender sentence is warranted. If the court both finds that the defendant is a persistent felony offender and is of the opinion that a persistent felony offender sentence is warranted, it may sentence the defendant in accordance with the provisions of subdivision two of section 70.10 of the penal law.10. Termination of hearing. At any time during the pendency of a hearing pursuant to this section, the court may, in its discretion, terminate the hearing without making any finding. In such case, unless the court recommences the proceedings and makes the necessary findings, the defendant may not be sentenced as a persistent felony offender.N.Y. Crim. Proc. Law § 400.20