Is it? The rest of the article doesn't give a reference for that law. The IG report says "This email included a draft of the search warrant affidavit, which contained information from the Weiner investigation that appears to have been under seal at the time in the Southern District of New York and information obtained pursuant to a grand jury subpoena issued in the Eastern District of Virginia in the Midyear investigation. We refer to the FBI the issue of whether Strzok’s use of personal email accounts violated FBI and Department policies."
Accuracy matters. If Strzok commited a crime then he needs to be prosecuted. If he used personal email in violation of policies, then there may not be a crime and he will be disciplined, not prosecuted.
Pennsylvania’s former attorney general, Kathleen Kane, was sentenced to 10-23 months in jail August 2016 for leaking sealed grand jury information.
It was a crime - Privacy Act insists only certain info is sent over unsecured lines even withing the system and prohibit sending it over private emails - all government employees get the training and all the systems have references to the Privacy Act on or near them as reminders....