If an individual housed in a special housing unit, residential rehabilitation unit or step-down unit engages in further misbehavior, staff assigned to the unit shall use de-escalation, conflict/dispute resolution, informational reports and/or withdrawal of incentives in the Progressive Inmate Movement System as the preferred methods of responding to misbehavior unless the department determines that non-disciplinary interventions have failed or shall be unsuccessful. Formal misbehavior reports shall only be used where the individual is accused of a serious offense, the alleged behavior demonstrates a threat to safety, or the individual has engaged in repeated disruptive behavior.