180 days after the date of enactment of this Act, and every 180 days thereafter until the progress report termination date described in subsection (c), the Administrator, in consultation with the Administrator of the Environmental Protection Agency and the Secretary of Defense, shall submit to the appropriate committees of Congress a progress report on the development and implementation of a national transition plan related to a fluorine-free firefighting foam that meets the performance standards referenced in chapter 6 of the advisory circular of the FAA titled Aircraft Fire Extinguishing Agents , issued on July 8, 2004 (Advisory Circular 150/5210–6D) and is acceptable under section 139.319(l) of title 14, Code of Federal Regulations, for use at part 139 airports. (b) Required information Each progress report under subsection (a) shall include the following: (1) An assessment of the progress made by the FAA with respect to providing part 139 airports with— (A) guidance from the Environmental Protection Agency on acceptable environmental limits relating to fluorine-free firefighting foam