NRS 171.177: When person detained must be taken before magistrate.

Except as otherwise provided in NRS 171.122 and 171.178, whenever any person is detained by a peace officer for any violation of a county, city or town ordinance or a state law which is punishable as a misdemeanor, the person must be taken without unnecessary delay before the proper magistrate, as specified in NRS 171.178 and 171.184, in the following cases:

1. When the person demands an immediate appearance before a magistrate;

2. When the person is detained pursuant to a warrant for the person’s arrest;

3. When the person is arrested by a peace officer; or

4. In any other event when the person is issued a misdemeanor citation by an authorized person and refuses to give a written promise to appear in court as provided in NRS 171.1773.