12 cfr 1026.13 July 8, 2019 16 32 64 128 12 cfr 1026.13 c )( 2 12 cfr 1026.13 c )( 1 12 cfr 1026.13 billing error resolution 12 cfr 1026.61 12 cfr 1026.2(a)(6) 12 cfr 1026.32(a) 12 cfr 1026.18 12 cfr ยง1024.15