Section 42.5 - When can a school use ADR processes to address an alleged violation?(a) The school may address an alleged violation through the ADR processes described in § 42.4 , unless one of the conditions in paragraph (b) of this section applies.(b) The school must not use ADR processes in any of the following circumstances:(1) Where the Act requires immediate expulsion ("zero tolerance" laws);(2) For a special education disciplinary proceeding where use of ADR would not be compatible with the Individuals with Disabilities Education Act (Pub. L. 105-17 ); or(3) When all parties do not agree to using alternative dispute resolution processes.(c) If ADR processes do not resolve matters or cannot be used, the school must address alleged violations through the formal disciplinary proceeding described in § 42.8 .