The governing body of any city having a population of more than four thousand inhabitants according to the latest official federal or state census may adopt, by ordinance, a civil service system for the selection, employment, classification, advancement, suspension, retirement, or discharge of appointive officials or employees of the city.
N.D. Cent. Code § 40-44-01
Cities of certain population may adopt civil service system
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.