In the US the following:
Fall protection practices, procedures and equipment for live performance venues are specified in both the Regulations for Industrial Establishments and Construction Projects, under the Occupational Health and Safety Act
Construction Projects O.Reg. 213/91, s. 26(1) to (9) apply where a worker is exposed to any of the following fall hazards:
• a height of more than 3 metres (approx. 10 feet);
• into operating machinery;
• into water or another liquid;
• into or onto a hazardous substance or object;
• though an opening in a work surface