CFR › Title 39 › Part 957 › §957.1839 CFR §957.18Verified 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 are made applicable to proceedings under these rules of practice.