An oral authorization is sufficient for any purpose, except that an authority to enter into a contract required by law to be in writing, other than an instrument covered by chapter 41-03 can be given only by an instrument in writing.
N.D. Cent. Code § 3-02-06
Form of authorization
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.