¶1—Proceeding pursuant to CPLR article 78 in the nature of prohibition, inter alia, to preclude the District Attorney "from enforcing an unlawful and invalid sentencie]’’, and application by the petitioner to prosecute the proceeding as a poor person.
¶2Upon the petition and papers filed in support of the proceeding, and no papers having been filed in opposition thereto, it is
¶3Ordered that the application for poor person relief is granted; and it is further,
¶4Adjudged that the petition is denied and the proceeding is dismissed, without costs or disbursements.
¶5"Because of its extraordinary nature, prohibition is available only where there is a clear legal right, and then only when a court—in cases where judicial authority is challenged—acts or threatens to act either without jurisdiction or in excess of its authorized powers” (Matter of Holtzman v Goldman, 71 NY2d 564, 569; see, Matter of Rush v Mordue, 68 NY2d 348, 352). The petitioner has failed to demonstrate a clear legal right to the relief sought. Bracken, J. P., Sullivan, Santucci, Joy and Mc-Ginity, JJ., concur.