Which marking identifies the applicable control systems for Sensitive Compartmented Information?

The correct choice is the banner marking. This type of marking is specifically designed to clearly identify the applicable control systems for Sensitive Compartmented Information (SCI). Banner markings are often used prominently at the top of documents to communicate the security classification and handling instructions, allowing individuals who access the information to immediately recognize the necessary precautions.

Banner markings typically include details about the classification level (e.g., Top Secret, Secret, Confidential) and any special access requirements that must be adhered to. This format is essential in ensuring that users are aware of the sensitivity of the information and the restrictions on its dissemination, which is particularly important given the classified nature of SCI.

The other marking types mentioned do not specifically serve this function. Access markings, for example, denote the specific access requirements for the information but lack the overarching clarity provided by banner markings in indicating control systems. Similarly, indicator markings and classified markings serve their own purposes but do not directly communicate the applicable control systems pertinent to Sensitive Compartmented Information.