The magistrate may exclude all witnesses who have not been examined. The magistrate also may cause the witnesses to be kept separate and to be prevented from communicating with each other until all are examined.
N.D. Cent. Code § 29-07-13
Witnesses kept separate - Exclusion during the examination of any witness
Official source: North Dakota Legislative Branch. Reproduced from public-domain North Dakota statutes; confirm against the official source for the current text. Not legal advice.