The board of directors of a public school and the authorities in control of a nonpublic school shall prescribe procedures requiring school officials to report to local law enforcement agencies any dangerous weapon, as defined in section 702.7, possessed on school premises in violation of school policy or state law.

The board of directors of a public school and the authorities in control of a nonpublic school shall prescribe procedures for continued school involvement with a student who is suspended or expelled for possession of a dangerous weapon, as defined in section 702.7, on school premises in violation of state law and for the reintegration of the student into the school following the suspension or expulsion.

The board of directors of a school district and the authorities in charge of a nonpublic school which receives services supported by federal funds shall expel from school for a period of not less than one year a student who is determined to have brought a weapon to a school or knowingly possessed a weapon at a school under the jurisdiction of the board or the authorities. However, the superintendent or chief administering officer of a school or school district may modify expulsion requirements on a case-by-case basis. This section shall not be construed to prevent the board of directors of a school district or the authorities in charge of a nonpublic school that have expelled a student from the student's regular school setting from providing educational services to the student in an alternative setting. If both this section and section 282.4 apply, this section takes precedence over section 282.4. For purposes of this section, "weapon" means a firearm as defined in 18 U.S.C. § 921. This section shall be construed in a manner consistent with the federal Individuals with Disabilities Education Act, 20 U.S.C. § 1400 et seq.