If no time is specified for the performance of an act required to be performed, a reasonable time is allowed. If the act in its nature is capable of being done instantly, as for example if it consists in the payment of money only, it must be performed immediately upon the thing to be done being exactly ascertained.
N.D. Cent. Code § 9-07-22
Rules governing time of performance when not specified
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.