§ 1578
72 words·~1 min read·
/ca/civil-code/1578A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
Mistake of law constitutes a mistake, within the meaning of this Article, only when it arises from:
1. A misapprehension of the law by all parties, all supposing that they knew and understood it, and all making substantially the same mistake as to the law; or,
2. A misapprehension of the law by one party, of which the others are aware at the time of contracting, but which they do not rectify.