Q. Our group has chosen The Chicago Manual of Style as a reference for our university translation project (textbook on international trade). What I’d like to know is whether, since we have chosen CMOS, it now supersedes the capitalization rules used by the publishing agencies of works cited in the text. For example, would it be “Customs—Trade Partnership Against Terrorism” as it appears on their website or “Customs—Trade Partnership against Terrorism,” following CMOS rules for lowercasing prepositions?
A. Chicago now capitalizes prepositions of five or more letters in title case—including Against—so you can keep the original. But to maintain consistency, you would need to adjust anything that does run contrary to Chicago style. See CMOS 8.160.