When a consideration is executory, it is not indispensable that the contract should specify its amount or the means of ascertaining it. It may be left to the decision of a third person, or regulated by any specific standard.
Okla. Stat. tit. 15, § 111
Executory - How determined
R.L.1910, § 931.
Official source: Oklahoma Legislature. Reproduced from public-domain Oklahoma statutes; confirm against the official source for the current text. Not legal advice.