As used in this chapter, unless the context otherwise requires:
(1) “Board” means the board of parole;
(2) “Chair” means the chair of the board of parole;
(3) “Commissioner” means the commissioner of correction;
(4) “Department” means the department of correction;
(5) “Institution” means an institution of the department;
(6) “Offender” means a person who is under the authority of the department, pursuant to a court order, a pending court disposition in a Tennessee criminal case or under the authority of the board, pursuant to release under probation or parole supervision, or some other release program from any correctional institution;
(7) “Region” means a probation region of the department of correction;
(8) “TCRB” means the Tennessee community resource board; and
(9) “Volunteer” means any person who, after fulfilling appropriate policy requirements, is assigned to a volunteer job and provides a service without pay from the department or board except for compensation for those expenses incurred directly as the result of volunteer services as defined in this chapter. A “volunteer” may present any grievance related to volunteer services to the TCRB, which shall make recommendations to the commissioner or the board, as appropriate, and may appeal any decision of the TCRB to the commissioner or to the board, as appropriate.