Ark. Code Ann. § 20-23-104: Periodic or regular attendance

(a) All boilers subject to the provisions of this chapter shall be continuously monitored by mechanical and electronic devices approved by the Director of the Division of Labor. When a plant is in operation or when any public building is occupied, the boilers shall be under regular attendance by a boiler operator unless otherwise exempt.

(b) Boilers that are manually operated shall be under constant attendance whenever they are in use for any purpose.

(c) All steam boilers fifty horsepower (50 hp) and over, as rated by the manufacturer in any location, and steam boilers used in hospitals, hotels, schools, theatres, and office buildings, but not limited to these places, shall be under regular attendance by a licensed operator who holds a certificate of competency issued by the Boiler Inspection Division.