Any respondent may, at any time
in the proceeding, unilaterally submit to enforcement counsel written
offers or proposals for settlement of a proceeding, without prejudice
to the rights of any of the parties. Any such offer or proposal may
only be made to enforcement counsel. Submission of a written settlement
offer does not provide a basis for adjourning or otherwise delaying
all or any portion of a proceeding under this part. No settlement
offer or proposal, or any subsequent negotiation or resolution, is
admissible as evidence in any proceeding.