What document will the SAO issue regarding a physical security preconstruction plan?

The correct answer is a written approval or disapproval because formal documentation is essential in the context of physical security preconstruction plans. When reviewing these plans, the Security Assessment Officer (SAO) needs to provide a clear, official response regarding whether the proposed measures meet the necessary security requirements. A written approval or disapproval serves not only as a record of the SAO's decision but also ensures compliance with established protocols and standards. This accountability is crucial in security contexts, where clear communication about the adequacy of security measures can prevent misunderstandings and promote effective implementation.

Using verbal communications like oral approvals or electronic notifications might lack the necessary formality and permanence that a written document offers. Similarly, summary reports do not typically convey approval or disapproval but may provide an overview of findings without definitive judgments on the plan's security validity. Thus, the requirement for a written approval or disapproval from the SAO is to ensure clarity, formality, and compliance in security operations.