The Rules of Engagement (ROE) document is essential for outlining the specific parameters of how a penetration test will be carried out, including the testing scope, methods, timelines, communication protocols, and restrictions. It sets the stage for both legal protection and confirming that the security firm operates within the agreed limits. The Acceptable Use Policy is related to the proper usage of company resources by employees and does not guide the conduct of a security firm during a penetration test. An Interconnection Security Agreement dictates the requirements for connecting systems and data sharing but is not specific to the conduct of a penetration test.