Which of the following is NOT one of the three security areas?

• A. Owner Controlled Area (OCA)
• B. Protected Area (PA)
• C. Vital Area (VA)
• D. Public Area

Answer: (D)

Access is organized in zones with escalating levels of control. The Vital Area is the most restricted zone, housing critical safety systems and personnel. Surrounding it is the Protected Area, which requires authorization to access and is designed to shield the VA. Outside of that sits the Owner Controlled Area, a broader area within the site that is still controlled but not as tightly restricted as the Protected or Vital Areas. Public Area is not one of these security zones—it lies outside the defined security areas and is generally accessible to the public. Because Public Area isn’t a designated security zone, it’s the option that does not fit among the three security areas. The other choices are all recognized security areas with specific access controls.