If a conveyor runs in a trough within three feet above the floor level, or just below the floor level, it shall either be completely covered with a substantial lid, or protected by a railing, and provided with necessary guard crossovers.
N.J. Admin. Code § 12:185-20.5
See: 38 N.J.R. 3130(a), 38 N.J.R. 5165(b).
Former N.J.A.C. 12:185-20.5, Passageway guards, recodified to N.J.A.C. 12:185-20.4.