The governing body of any municipality constituting a constituent district or the board of education of any such constituent district and the board of education of the regional district shall, within 15 days after service of a copy of the petition upon it, file an answer thereto with the commissioner and serve a copy of such answer upon the board of education of every other constituent district and of the regional district and the county superintendent. The answer shall set forth matters similar to those described in section 6 of this act.
N.J.S. § 18A:13-55