Section 40 Confinement to isolation unit in correctional institutions
Section 40. For the enforcement of discipline, an inmate in any correctional institution of the commonwealth may, at the discretion of its superintendent, be confined, for a period not to exceed fifteen days for any one offence, to an isolation unit.
Such isolation units must provide light, ventilation and adequate sanitary facilities, may contain a minimum of furniture, and shall provide at least one full meal daily.