Is there a law against “lacking candor”?
People could try, you know, reading the document. At least partly. "Lack of Candor" is an actual internal FBI disciplinary offense, which includes not only lying but not being fully forthcoming.
This is an internal FBI investigation regarding an FBI disciplinary matter. It is not an indictment on criminal charges. If someone committed a crime they can also be charged, but that would be something separate.
It is next to the statutes on matters and collusions.