Which chapter of the NISPOM primarily focuses on physical security measures?

The correct answer is based on the structure of the National Industrial Security Program Operating Manual (NISPOM), which outlines specific chapters dedicated to various aspects of security. Chapter 3 primarily focuses on physical security measures. This chapter details the requirements for protecting classified information and provides guidelines for physical access controls, such as barriers, entry controls, and surveillance systems designed to safeguard sensitive facilities and information.

This chapter's emphasis on physical security underlines its critical role in comprehensive security planning. It serves as a fundamental component of a Facility Security Officer's responsibilities, ensuring that adequate measures protect against unauthorized access and potential breaches. Understanding the contents and objectives outlined in Chapter 3 is essential for implementing effective security measures within a facility handling classified information.