I worked outdoors in Saudi Arabia and we just worked 24 hours/day (sometimes I'd go 70 hours without sleep while wiring detonators to hundreds of feet of explosives). I'm American btw, just worked on oil rigs there for a couple years as a "Wireline Engineer".
In both USA and Saudi, it seemed to be more based on company rules, rather than state/federal rules.
In both USA and Saudi, it seemed to be more based on company rules, rather than state/federal rules.