In each instance that a formal hearing is required by institutional policy or chapter 28B.19 RCW, and upon receipt of a request for a formal hearing filed in accordance with chapter 28B.19 RCW, the chairman, vice chairman, or another member of the board of trustees, on the basis of longevity and in the preceding order, may appoint one or more hearing officers, not to exceed three for any one hearing, to preside over, conduct and make proposals for decisions, including findings of fact and conclusions of law, in each instance, and shall afford an opportunity for a formal hearing after not less than ten days notice and provide such individual requesting formal hearing with notice of the hearing in accordance with the provisions of chapter 28B.19 RCW.