Which blood alcohol thresholds apply when driving automotive machinery on a public road in Chile?

1. A special zero limit of 0.00 g/l applies to special-licence holders
2. The same thresholds as for any driver: more than 0.3 and less than 0.8 g/l is 'bajo la influencia del alcohol', and 0.8 g/l or above is 'estado de ebriedad'
3. 0.5 g/l, because the vehicle travels slowly
4. No limit applies off the main carriageway