This chapter applies to proceedings before agencies of the Department of Public Safety and Correctional Services if an issue concerning the legal rights, duties, statutory entitlements or privileges of a party is required by law or constitutional right to be determined by a hearing. This chapter does not apply to: Personnel grievance hearings; Conferences; Informal investigations; Proceedings before agencies that have adopted regulations governing that agency's hearings; or Other proceedings in which hearings are not required by law.