Seventh Exception.-It is not defamation in a person having over another any authority, either conferred by law or arising out of a lawful contract made with that other, to pass in good faith any censure on the conduct of that other in matters to which such lawful authority relates. Illustration A Judge censuring in good faith the conduct of a witness, or of an officer of the Court; a head of a department censuring in good faith those who are under his order; a parent censuring in good faith a child in the presence of other children; a school master, whose authority is derived from a parent, censuring in good faith a pupil in the presence of other pupils; a master censuring a servant in good faith for remissness in service; a banker censuring in good faith the cashier of his bank for the conduct of such cashier as such cashier- are within this exception.