Commonwealth Consolidated Acts Commonwealth Consolidated ActsImmediately after a person in custody is charged with a service offence, the investigating officer in charge of investigating the service offence shall caution the person, or cause the person to be cautioned, in a language in which the person is reasonably fluent, in writing, and also, if practicable, orally, that the person is not obliged to, but may if the person wishes to do so, answer any questions, or do any thing, asked of the person by an investigating officer and that anything said or done by the person may be used in evidence.