(a) Other Federal Regulations.--Except as provided in
section 899G, nothing in this subtitle affects any regulation
issued by any agency other than an agency of the Department.
(b) State Law.--Subject to section 899G, this subtitle
preempts the laws of any State to the extent that such laws are
inconsistent with this subtitle, except that this subtitle
shall not preempt any State law that provides additional
protection against the acquisition of ammonium nitrate by
terrorists or the use of ammonium nitrate in explosives in acts
of terrorism or for other illicit purposes, as determined by
the Secretary.