10 cfr part 21 July 8, 2019 16 32 64 128 10 cfr part 21 reports 10 cfr part 21 reporting of defects and noncompliance 10 cfr part 217 10 cfr part 21 pdf Nuclear 10 cfr part 21 10 cfr 50 appendix b part 21 21 cfr part 10 and 11 10 cfr part 20 10 cfr 2 10 cfr 21