of such System, which includes first-line supervisors of sales workers, cashiers, gaming change persons and booth cashiers, counter and rental clerks, parts salespersons, and retail salespersons. (B) Food preparation and serving related occupations as described in 35–0000, and all subdivisions thereof, of such System, which includes supervisors of food preparation and serving workers, cooks and food preparation workers, food and beverage serving workers, and other food preparation and serving related workers. (C) Building cleaning occupations as described in 37–2011, 37–2012 and 37–2019 of such System, which includes janitors and cleaners, maids and housekeeping cleaners, and building cleaning workers. (20) Secretary The term Secretary means the Secretary of Labor. (21) Serious health condition The term serious health condition has the meaning given the term in section 101 of the Family and Medical Leave Act of 1993 ( 29 U.S.C. 2611 ). (22) Sibling The term sibling means a brother or sister, whether related by half blood, whole blood, or adoption, or as a stepsibling. (23) Split shift The term split shift means a schedule of daily hours in which the hours worked are not consecutive, except that— (A) a schedule in which the total time out for meals does not exceed one hour shall not be treated as a split shift