For nurses who have been regularly working a shift described in Section¬†12 for thirty (30) or more days immediately preceding a paid holiday, comp time off, or the beginning of a vacation or a paid sick leave period, the applicable differential shall be included in the nurse’s holiday pay, vacation pay, paid sick leave, or paid comp time.¬† The vacation, sick leave, holiday and comp time off pay of a nurse on a rotating shift shall include the differential such nurse would have received had he/she been working during such period.