Final answer:
The minimum age requirement for a manager operating a school or shop is generally 18 years old, following Federal law guidelines set in 1938 to restrict employment and encourage education for younger individuals.
Step-by-step explanation:
The question about the minimum age requirement for a manager operating a school or shop asks for a specific legal age at which an individual can take on a managerial role. While there might be variations depending on local laws, the Federal law from 1938, which restricts the employment and abuse of child workers, implies that the minimum age to work without restrictions in potentially dangerous jobs is 18 years old. This age limit was set to encourage schooling for younger individuals. Prior to that, different limitations were in place, such as the establishment of a minimum working age of 9 and a maximum workday of 9 hours for children ages 9-13, as well as a maximum workday of 12 hours for those 13-18.