Section 14 in The Bharatiya Nyaya Sanhita, 2023

Act done by a person bound, or by mistake of fact believing himself bound, by law

Nothing is an offence which is done by a person who is, or who by reason of a
mistake of fact and not by reason of a mistake of law in good faith believes himself to be,
bound by law to do it.
Illustrations.
(a) A, a soldier, fires on a mob by the order of his superior officer, in conformity with the
commands of the law. A has committed no offence.

(b) A, an officer of a Court, being ordered by that Court to arrest Y, and, after due
enquiry, believing Z to be Y, arrests Z. A has committed no offence.