C.__If, in the opinion of the bureau, the factual basis of a complaint under this subsection is or may be true and the complaint is of sufficient gravity to warrant further action, the bureau may request an informal conference with the certificate holder.__The bureau shall provide the certificate holder with adequate notice of the conference and of the issues to be discussed.__The conference must be conducted in executive session of the bureau pursuant to Title 1, section 405 unless otherwise requested by the certificate holder.__Statements made at the conference may not be introduced at a subsequent formal administrative or judicial hearing unless all parties consent.__The certificate holder may, without prejudice, refuse to participate in an informal conference if the certificate holder prefers to request an adjudicatory hearing.__If the certificate holder participates in the informal conference, the certificate holder waives the right to object to a participant at the hearing who participated at the informal conference.

D.__If the bureau finds that the factual basis of a complaint under this subsection is true and is of sufficient gravity to warrant further action, it may take any of the following actions.

(1)__The bureau may negotiate a consent agreement with the certificate holder that fixes the period and terms of probation necessary to protect the public health and safety and to rehabilitate or educate the certificate holder.__A consent agreement may be used to terminate a complaint investigation, if entered into by the bureau, the certificate holder and the Attorney General.

(2)__If a certificate holder voluntarily surrenders a certificate, the bureau may negotiate stipulations necessary to ensure protection of the public health and safety and the rehabilitation or education of the certificate holder.__These stipulations may be set forth only in a consent agreement signed by the bureau, the certificate holder and the Attorney General.

(3)__If the bureau concludes that modification, nonrenewal or suspension of a certificate is in order, the bureau shall so notify the certificate holder and