49 CFR 512.6

Q's brackets from § 512.6?

§ 512.6

(2) If the information for which confidentiality is being requested is contained within a page, the submitter shall enclose each item of information that is claimed to be confidential within brackets: “[ ].”

Houston, we have brackets!

According to § 512.6, brackets imply confidential information, ie, the "target".

Q's brackets = names of those being indicted?

https://www.law.cornell.edu/cfr/text/49/512.6