The object of a contract must be lawful when the contract is made and possible and ascertainable by the time the contract is to be performed. Everything is deemed possible except that which is impossible in the nature of things.
N.D. Cent. Code § 9-04-02
Requisites of object
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.