20. For the purposes of this Division, establishments and construction sites are classified as follows:(1) any establishment covered by Schedule 1, where:(a) at least 100 workers are working; or
(b) more than 20 workers are working and where it is not possible to reach within 30 minutes by road and under normal conditions an ambulance service, a hospital, a local community service centre, a medical clinic or polyclinic or other emergency medical services, including the health services of an establishment or construction site;
(2) any establishment in the “Forestry” sector covered by paragraph B of Schedule 1 where not more than 20 workers are working;
(3) any construction site where at least 25 workers are working simultaneously at any given time and where it is not possible to reach, within 30 minutes by road and under normal conditions, a hospital, a local community service centre, a medical clinic or polyclinic or other emergency medical services, including the health services of an establishment or construction site;
(4) any other establishment or construction site.