When an alarm sounds, the PSO shall immediately report and record the incident as required by what document?

The correct choice is Post Orders, as this document serves as a comprehensive guideline for security personnel, outlining their responsibilities and procedures during incidents, including alarm responses. Post Orders typically detail the specific actions a Personnel Security Officer (PSO) must take when an alarm is triggered, ensuring a standardized response that conforms to the organization’s protocols. By reporting and recording the incident according to the Post Orders, the PSO not only follows established guidelines but also helps maintain effective communication and documentation, which are crucial in security operations.

The other options relate to regulations or specific forms and do not specifically outline the operational procedures that security personnel must follow in the event of an alarm, making them less relevant in this context.