Citation, Documentation of Sources

Q. I have a question about copyright notices in image credit lines. CMOS 3.32 says that credit lines “occasionally” require a copyright date, but I’m not sure when they do and when they don’t. The first example doesn’t have a copyright date, while the second example, which is formatted identically in other respects, does. Is this determined by the permission grantor, or are there other factors involved?

A. It is indeed determined by the permission grantor, who may specify that the copyright date be included in the credit line. For advice on a specific situation that isn’t clear, please consult an attorney who specializes in intellectual property law.