Since 2011. An occasional commonplacing of the U.S. Circuit Courts of Appeal.
Not written by a barrister. The name was thought up by a second-year American law student sitting in a coffeehouse in Manhattan. Neither an authoritative statement of the law nor legal advice. Don't rely. Quick work.
Second Circuit: United States ex rel. Weiner et al. v. Siemens AG et al.
As the qui tam statute references both the unsealing of the complaint and the court's direction to serve the defendant, the clock for serving the defendant did not begin to run until the court ordered service.