It is unlawful for any person to work, for compensation, as a master plumber, journeyman plumber, or plumber's apprentice without being registered and licensed as a plumber in such classification.
N.D. Cent. Code § 43-18-23
Working as plumber without license
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.