Which document provides guidance on the sharing of technical data with foreign partners?

The International Traffic in Arms Regulations (ITAR) is the correct choice because it specifically governs the export and sharing of defense-related technical data and services with foreign entities. ITAR is part of U.S. law and is designed to ensure that sensitive technological information does not end up in the hands of individuals or nations that may pose a risk to national security. The guidance provided by ITAR includes detailed requirements for obtaining licenses before any technical data can be shared with foreign partners, reflecting the importance of maintaining control over sensitive military technologies.

In contrast, the other documents mentioned serve different purposes. The Federal Acquisition Regulation (FAR) provides general rules for the procurement process but does not specifically address the sharing of technical data with foreign partners. The Defense Federal Acquisition Regulation (DFAR) supplements the FAR and includes specific guidelines related to defense acquisitions but does not focus exclusively on international data sharing. The National Defense Authorization Act (NDAA) primarily outlines budgetary provisions and policies for defense spending and does not directly govern the sharing of technical data with foreign nations.