New York Consolidated Laws, Criminal Procedure Law - CPL § 620.40 Material witness order;  arraignment

1. When the prospective witness appears before the court, the court must inform him of the nature and purpose of the proceeding, and that he is entitled to a prompt hearing upon the issue of whether he should be adjudged a material witness.  The prospective witness possesses all the rights, and is entitled to all the court instructions, with respect to right to counsel, opportunity to obtain counsel and assignment of counsel in case of financial inability to retain such, which, pursuant to subdivisions three through five of section 180.10, accrue to a defendant arraigned upon a felony complaint in a local criminal court.

2. If the proceeding is adjourned at the prospective witness' instance, for the purpose of obtaining counsel or otherwise, the court must order him to appear upon the adjourned date.  The court may further fix bail to secure his appearance upon such date or until the proceeding is completed and, upon default thereof, may commit him to the custody of the sheriff for such period.