The beneficial interest in an express trust can be transferred only by operation of law or by a written instrument subscribed by the person making the transfer or by the person's agent.
N.D. Cent. Code § 47-11-02
Interest in express trusts - Operation of law or written instrument required
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.