Final answer:
Federal OSHA regulations stipulate that fall protection is required on scaffolds when the platform is more than 10 feet above a lower level.
Step-by-step explanation:
In the context of workplace safety, particularly on scaffolds, federal regulations mandated by the Occupational Safety and Health Administration (OSHA) require that fall protection must be used when the height of a platform is more than 10 feet above a lower level. This ensures safety for workers who are at risk of falling, which could result in serious injuries or fatalities. Employers must adhere to these OSHA regulations to ensure a safe working environment for their employees.