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No such law exists in any jurisdiction. A contract requires (1) an offer; (2) acceptance of the offer; and (3) consideration (a legal detriment taken in exchange for the bargain contained in the offer).
For any other contract issue, the court can imply "reasonable" terms to fill in the gaps.
That said, if you have a particular issue, and you want to share the facts, I'll be happy to try to analyze it for you.
Hope this helps.
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