49 cfr part 40 alcohol testing July 8, 2019 16 32 64 128 49 cfr part 40 drug and alcohol testing form 49 cfr part 40 drug and alcohol testing release of information form 49 cfr part 40 49 cfr part 40 and 14 cfr part 120 Which guidelines are covered in 49 cfr part 40 Part 40 subpart o 49 cfr part 382