In the case of United States Department of Defense, et al. v. Federal Labor Relations Authority et al., 1993, the Supreme Court ruled on whether certain statutory exemptions to disclosure under the Freedom of Information Act (FOIA) could be applied in a labor relations context. The dispute arose when a union representing federal employees requested information from the Department of Defense about its employees' home addresses for communication purposes. The department refused to provide this information citing privacy concerns and FOIA exemption provisions that protect personal data from public release without consent. The Federal Labor Relations Authority (FLRA), which oversees labor relations within federal agencies, ordered the department to disclose this information as it was necessary for collective bargaining processes under existing labor laws. However, upon reaching Supreme Court review, it was held that FLRA's order violated FOIA’s privacy protections and thus reversed FLRA's decision stating that an agency is not required by federal labor law to turn over address lists where doing so would violate individuals’ rights protected by Privacy Act and exempted by FOIA.

In the dissenting opinion for the case United States Department of Defense, et al. v. Federal Labor Relations Authority et al., Justice Blackmun argued that the majority's decision was a misinterpretation of Congress' intent in creating an exception to collective bargaining rights for federal employees when national security is at stake. He contended that this exception should only apply in cases where there is a direct and immediate threat to national security, not simply because certain information may be classified as secret or sensitive. Furthermore, he criticized the majority's reliance on executive branch interpretations rather than legislative history to determine Congressional intent. In his view, this approach undermines labor relations stability and fails to uphold workers' rights under federal law.