Final answer:
DoD directives and instructions are the guidance that disseminates policy and procedures for overseeing DoD Special Access Programs, similar to how some agencies report to Congress.
Step-by-step explanation:
The guidance that disseminates policy, assigns responsibilities, and prescribes procedures for the management, administration, and oversight of all Department of Defense (DoD) Special Access Programs (SAPs) is found in the DoD directives and instructions specific to SAPs. This guidance ensures that these programs are regulated under strict protocols due to their sensitive nature. It also establishes the channels through which these programs are reported, including Congress for oversight and funding, akin to the reporting structure mentioned for agencies such as NASA in the provided information.