Where a contract has but a single object, and such object is unlawful, whether in whole or in part, or wholly impossible of performance, or so vaguely expressed as to be wholly unascertainable, the entire contract is void.
Okla. Stat. tit. 15, § 104
Unlawful object - Performance impossible - Object vaguely expressed
R.L.1910, § 924.
Official source: Oklahoma Legislature. Reproduced from public-domain Oklahoma statutes; confirm against the official source for the current text. Not legal advice.