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 specified standard.
Mont. Code Ann. § 28-2-812
How amount of executory consideration may be determined
En
Official source: Montana Code Annotated (Montana Legislature). Reproduced from public-domain Montana statutes; confirm against the official source for the current text. Not legal advice.