[Source or answer dispute] Official B: two-cent rounding gap

What you will learn

Disputed-question explanation: official result first, then historical evidence, limitations and uncertainty.

Saved full original April 2023 exam and key text: question 61 stem as printed (lines 775–780); Same file; question 61 fee and claim-type facts; Same file; options A–E as printed (lines 781–785); Same file; official key heading; Same file; official key row 61 text (line 1097); Same file; exam cover CFR reference; Same file; exam cover instruction; Same file; 'Category IX – Modernized Drawback' heading on page 26 (line 729), the category containing questions 57–61 before 'Category X – Broker Compliance' on page 28; Local copy of CBP-authored exam and key PDF (not a live CBP URL); its page 27 was rendered temporarily outside the repository (pdftoppm, 110 dpi, /tmp/q61build/p-27.png) and the actual page image viewed: question 60 and question 61 with the full stem and options A–E; no saved page-27 PNG exists in source-evidence and none was added; Actual official key page image viewed; row 61 'Answer B' with citation '19 CFR 190.51 and 191.51'; no working or reason printed; 2021 19 CFR 190.51(b)(1) — claim generally 99 percent (GovInfo 2021 annual edition, text); Same file; 190.51(b)(1)(i) direct identification; Same file; 190.51(b)(2) lead-in — MPF apportionment required whenever an MPF refund is requested; Same file; 190.51(b)(2)(i) relative value ratio to four decimal places; Same file; 190.51(b)(2)(ii); Same file; 190.51(b)(2)(iii); Same file; 190.51(b)(2) worked example — ratio rounded to four decimals; Same file; 190.51(a)(2)(vii) — refund amounts calculated to two decimal places; 2021 19 CFR 191.51(b)(1) — claim generally 99 percent of import duties; Same file; 191.51(b)(2) lead-in (scope: 1313(j) unused merchandise drawback and certain petroleum substitution); Same file; 191.51(b)(2)(i) relative value ratio to four decimal places; Same file; 191.51(b)(2)(ii)–(iii); 2021 GovInfo XML of 19 CFR 190.51 (DATE 2021-04-01); header confirms edition; 2021 GovInfo XML of 19 CFR 191.51 (DATE 2021-04-01); header confirms edition · April 26, 2023 Customs Broker License Examination, question 61 on PDF page 27 under 'Category IX – Modernized Drawback' (heading on page 26; page 27 rendered temporarily from Apr2023-original-resume0102.pdf and viewed); 'APRIL 2023 CUSTOMS BROKER LICENSE EXAM ANSWER KEY', row 61 on key PDF page 36 (Apr2023-key-page36.png). Cover reference used: Title 19, Code of Federal Regulations (2021 Revised as of April 1, 2021). Text used: complete 2021 19 CFR 190.51 and 191.51 (GovInfo 2021 XML/text, DATE 2021-04-01). No ruling, later revision, current MPF rate or current law is used; the 0.3464% rate is taken from the stem.
Explained using the historical edition for this exam.