The object of a contract must be lawful when the contract is made, and possible and ascertainable by the time this contract is to be performed.
Okla. Stat. tit. 15, § 102
Requisites of the object
R.L.1910, § 922.
Official source: Oklahoma Legislature. Reproduced from public-domain Oklahoma statutes; confirm against the official source for the current text. Not legal advice.