What is the Effect of mistakes as to law? Section 21 of Indian Contract Act 1872
21. A contract is not voidable because it was caused by a mistake as to any law in force in India; but a mistake as to a law not in force in India has the same effect as a mistake of fact.
A and B make a contract grounded on the erroneous belief that a particular debt is barred by the Indian Law of Limitation; the contract is not voidable.
CHAPTER III CONTINGENT CONTRACTS
CHAPTER IV THE PERFORMANCE OF CONTRACTS
By whom contracts must be performed