Final answer:
Scaffolds must be designed by a licensed engineer, who has the technical knowledge and qualifications to ensure structural safety and stability.
Step-by-step explanation:
When scaffolds are constructed and required to be loaded according to their design, it is imperative that the design process be overseen by individuals with the appropriate expertise and qualifications. In this context, the design should be done by a licensed engineer. Engineers are professionally trained to understand structures and the forces acting on them, and they have the technical knowledge to ensure safety and stability. Architects, for example, may determine the aesthetic and functional layout of a building but for the design of elements such as scaffolding that require a precise understanding of load-bearing capacities and structural integrity, a licensed engineer is required.