Section 23-232 - Prohibited employments of persons under the age of sixteenA. In addition to the prohibited employments under section 23-231, unless a variance is granted pursuant to section 23-241, a person shall not employ or allow a person under the age of sixteen years to work in, about or in connection with:3. Laundering or dry cleaning in a commercial laundry.6. Boiler, furnace or engine rooms.7. Occupations, including window washing, involving work from a ladder, scaffold, window sill or similar structure or place more than five feet in height.8. Any of the following activities in a retail food or gasoline service establishment: (a) Maintenance or repair of machines or equipment of the establishment, except work in connection with cars and trucks if confined to dispensing gasoline and oil, courtesy service, car cleaning, washing and polishing but not including work involving the inflation of any tire mounted on a rim equipped with a removable retaining ring.(b) Cooking and baking, except at soda fountains, lunch counters, snack bars or cafeteria serving counters.(c) Setting up, adjusting, cleaning, oiling or repairing power-driven food slicers, grinders, choppers and cutters.(d) All work in preparation of meats for sale, except wrapping, sealing, labeling, weighing, pricing and stocking.9. Any of the following activities in agriculture: (a) Operating a tractor over twenty power take off horsepower that is not equipped with a rollover protective structure and seatbelts.(b) Connecting or disconnecting an implement or any of its parts to or from a tractor over twenty power take off horsepower.(c) Operating a corn picker, cotton picker, grain combine, hay mower, forage harvester, hay baler, potato harvester, mobile pea viner, feed grinder, crop dryer, forage blower, auger conveyor or self-unloading wagon, power post hole digger, power-driven nonwalking rotary type tiller, trencher or earthmoving equipment or potato combine. In this subdivision "operating" means starting, stopping, adjusting, feeding or any other activity regarding physical conduct associated with such machines and machinery.(d) Working in a pen occupied by a bull, boar or stud horse maintained for breeding purposes, a sow with young pigs or a cow with a newborn calf.(e) Felling, bucking, skidding or unloading timber with butt more than six inches in diameter.(f) Picking or pruning from a ladder over eight feet in height.(g) Riding on a tractor as a helper or driving a bus, truck or automobile.(h) Working inside a fruit storage area or grain storage area designed to retain an oxygen deficient or toxic atmosphere, an upright silo within two weeks after silage has been added, a manure pit or operating a tractor for packing purposes in a horizontal silo.(i) Handling hazardous agricultural chemicals.(k) Transporting, transferring or applying anhydrous ammonia.B. The industrial commission may by regulation declare any other occupation to be dangerous to lives or limbs or injurious to the health and morals of persons under sixteen years of age and prohibit the employment or allowance to work in, about or in connection with the occupations by such persons unless a variance is granted.