a long slender part, such as the portion of a long bone between the wider ends or extremities, the shaft of a hair and the central shaft of a feather.
maximum number of hours for 16- and 17-year-old minors is 4 hours on a school day (6. hours with a special variance), 8 hours on a Friday or any non-school day and not more. than 6 days per week. The maximum number of hours of work for 16- and 17-year-old. minors is 20 or 28 (with the optional special variance).
1 Minors under six years of age shall not work more than six hours per day; minors six years of age to 15 years of age shall not work more than eight hours per day.  Minors shall receive a 12-hour rest break at the end of each work day, before the commencement of the next day of work.