CFR › Title 39 › Part 952 › §952.3439 CFR §952.34Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy linkThe provisions of 5 U.S.C. 551(14), 556(d), and 557(d) prohibiting ex parte communications apply to proceedings under these rules of practice.