12-180-12 Me. Code R. § 21
A complaint may be withdrawn by the complaining party with the approval of the Board. If the withdrawal is without the approval of the other party, the withdrawal must be with prejudice. No proposed withdrawal based upon the settlement of a complaint within the Board's jurisdiction which contains an allegation of unlawful discrimination against any individual may be approved by the Board without notice to the discriminatee. Unlawful discrimination within the meaning of this rule includes discrimination in hire, or any term or condition of employment, on the basis of lawful organizational or collective bargaining activity or affiliation. Unlawful discrimination also includes discrimination based on the signing or filing of any affidavit, petition or complaint, or the giving of any information or testimony under the labor relations statutes. The notice by the Board must state the terms of the proposed settlement, apprise the discriminatee of the opportunity to refrain from joining in the settlement, extend the opportunity to assume party status concerning charges of discrimination addressed by the settlement in which the discriminatee does not join and set a reasonable deadline for the filing of notice of intention regarding the proposed settlement. A comparable notice provided by the complainant and signed by the individual discriminatee may be approved by the Board when appropriate.
12-180 C.M.R. ch. 12, § 21