If the party having the right of selection between alternative acts does not give notice of that party's selection to the other party within the time, if any, fixed by the obligation for that purpose, or, if none is fixed, before the time at which the obligation ought to be performed, the right of selection passes to the other party.
N.D. Cent. Code § 9-01-18
Option - Limitation of time for performance
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.