The official supervising the inmate shall have the authority to compel such work as set out in this chapter and shall be responsible for the safekeeping and return to the detention center of such inmate to the custody of the director or designee at the end of each day's work. The day's work shall be within the discretion of the official so supervising at the time, but shall not exceed eight (8) hours. Any sentenced inmate who refuses to perform the work required shall be subject to disciplinary action or the loss of accrued good conduct time. No inmate shall be compelled to perform such work whose health is not in a condition to allow the same. The certificate of the physician from the department of correction and rehabilitation or other physician shall be sufficient to excuse such labor. (1976 L.M.C., ch. 24, § 1.)