Final answer:
A Controlled Access Zone (CAZ) must be erected a certain distance away from an unprotected edge to ensure safety in construction.
Step-by-step explanation:
A Controlled Access Zone (CAZ) must be erected a certain distance away from an unprotected edge to ensure safety. This distance can vary depending on the specific regulations or guidelines provided by the relevant authorities or organizations. For example, in some construction industry standards, a CAZ must be erected at least 6 feet away from an unprotected edge. This distance is intended to provide a buffer zone to protect workers from potential hazards and falls.