Final answer:
The area specified for work without traditional safety systems and where access is controlled is known as a Controlled Access Zone.
Step-by-step explanation:
The zone you're referring to, where work such as overhand bricklaying may take place without the use of guardrail systems, personal fall arrest systems, or safety net systems, and access to the zone is controlled, is known as a Controlled Access Zone. This concept is commonly associated with construction and occupational safety, ensuring that only those authorized can enter and perform work in the specified area. Other regulations may control zoning restrictions to preserve the character of certain areas or to manage the use of local resources, which is applicable in contexts outside of the immediate safety concerns of a construction site.