shall issue regulations that specify a process the Secretary will follow to identify and designate additional occupations, for purposes of section 4(a), that are appropriate for coverage under this Act. Nonexempt employees in such occupations shall be considered to be designated employees for purposes of this Act. (B) Criteria The regulations shall provide that the Secretary shall so designate an additional occupation— (i) in which not less than 10 percent of workers employed in the occupation generally— (I) receive advance notice of their work schedules less than 14 days before the first day of the work schedules