; or (4) the conduct described in subsection (a)— (A) interferes with commercial or other economic activity in which the victim is engaged at the time of the conduct; or (B) otherwise affects interstate or foreign commerce. (c) Certification requirement (1) In general No prosecution of any offense described in this section may be undertaken by the United States, except under the certification in writing of the Attorney General, or a designee, that— (A) the State does not have jurisdiction; (B) the State has requested that the Federal Government assume jurisdiction; (C) the verdict or sentence obtained pursuant to State charges left demonstratively unvindicated the Federal interest in protecting the public safety