(a) At any time prior to the filing of objections to the findings and/or order, a complainant may withdraw his or her complaint under any of the statutes listed in § 24.100(a) by filing a written withdrawal with the Assistant Secretary. The Assistant Secretary will then determine whether to approve the withdrawal. The Assistant Secretary will notify the respondent of the approval of any withdrawal. If the complaint is withdrawn because of settlement under the Energy Reorganization Act, the Clean Air Act, the Safe Drinking Water Act, or the Toxic Substances Control Act, the settlement must be submitted for approval in accordance with paragraph (d) of this section. Parties to settlements under the Federal Water Pollution Control Act, the Solid Waste Disposal Act, and the Comprehensive Environmental Response, Compensation and Liability Act are encouraged to submit their settlements for approval. After the filing of objections to the Assistant Secretary's findings and/or order, a complainant may not withdraw his or her complaint.

(b) The Assistant Secretary may withdraw his or her findings and/or order, at any time before the expiration of the 30-day objection period described in § 24.106, provided that no objection has yet been filed, and substitute new findings and/or a new order. The date of the receipt of the substituted findings and/or order will begin a new 30-day objection period.

(c) At any time before the Assistant Secretary's findings or order become final, a party may withdraw its objections to the Assistant Secretary's findings or order by filing a written withdrawal with the ALJ. If a case is on review with the ARB, a party may withdraw its petition for review of an ALJ's decision at any time before that decision becomes final by filing a written withdrawal with the ARB. The ALJ or the ARB, as the case may be, will determine whether to approve the withdrawal of the objections or the petition for review. If the ALJ approves a request to withdraw objections to the Assistant Secretary's findings or order, and there are no other pending objections, the Assistant Secretary's findings and order will become the final order of the Secretary. If the ARB approves a request to withdraw a petition for review of an ALJ decision, and there are no other pending petitions for review of that decision, the ALJ's decision will become the final order of the Secretary. If the objections are withdrawn because of settlement under the Energy Reorganization Act, the Clean Air Act, the Safe Drinking Water Act, or the Toxic Substances Control Act, the settlement must be submitted for approval in accordance with paragraph (d) of this section.

(d)(1) Investigative settlements under the Energy Reorganization Act, the Clean Air Act, the Safe Drinking Water Act, and the Toxic Substances Control Act. At any time after the filing of a complaint, and before the findings and/or order are objected to or become a final order by operation of law, the case may be settled if the Assistant Secretary, the complainant and the respondent agree to a settlement. The Assistant Secretary's approval of a settlement reached by the respondent and the complainant demonstrates his or her consent and achieves the consent of all three parties.

(2) Adjudicatory settlements under the Energy Reorganization Act, the Clean Air Act, the Safe Drinking Water Act, and the Toxic Substances Control Act. At any time after the filing of objections to the Assistant Secretary's findings and/or order, the case may be settled if the participating parties agree to a settlement and the settlement is approved by the ALJ if the case is before the judge, or by the ARB if the ARB has accepted the case for review. A copy of the settlement must be filed with the administrative law judge or the ARB, as the case may be.

(e) Any settlement approved by the Assistant Secretary, the administrative law judge, or the ARB will constitute the final order of the Secretary and may be enforced pursuant to § 24.113.