Section 25. Each grand and trial juror from whom the office of jury commissioner has not received a response to the juror summons by the eighth week preceding the term of service for which the juror was summoned shall be summoned a final time. The final summons shall have the same content and form as the juror summons, except the words ''Final Summons'' shall appear prominently on the face of the summons. The final summons shall be sent by first-class mail, registered mail or served by a sheriff or constable. A juror who receives a final summons shall respond to the final summons within 5 days of receipt thereof by any of the means provided in section 24.