standards (a) Safety belt standards for stretch limousines Not later than 2 years after the date of enactment of this Act, the Secretary shall prescribe a final rule amending Federal Motor Vehicle Safety Standard Numbers 208 to require safety belts to be installed in stretch limousines with a gross vehicle weight rating greater than 8,500 pounds at each designated seating position, including on side-facing seats. (b) Seating system standards for stretch limousines Not later than 2 years after the date of enactment of this Act, the Secretary shall prescribe a final rule amending Federal Motor Vehicle Safety Standard Number 207 to require stretch limousines to meet standards for seats (including side-facing seats), attachment assemblies, and installation to minimize the possibility of their failure by forces acting on them as a result of vehicle impact. (c) Report on retrofit assessment for stretch limousines Not later than 2 years after the date of enactment of this Act, the Secretary shall submit to the Committee on Energy and Commerce of the House of Representatives and the Committee on Commerce, Science, and Transportation of the Senate a report that assesses the feasibility, benefits, and costs with respect to the application of any requirement established under subsection (a) or (b) to a stretch limousine altered before the date on which the requirement applies to a new stretch limousine. (d) Safety standards for altering used vehicles into stretch limousines Not later than 1 year after the date of enactment of this Act, the Secretary shall prescribe a final rule revising the regulations under section 567.7 of title 49, Code of Federal Regulations, to require a stretch limousine alterer to comply with the requirements for persons who alter certified vehicles. 4. Stretch limousine compliance with Federal safety standards (a) In general Chapter 301 of subtitle VI of title 49, United States Code, is amended by inserting after section 30128 the following new section: 30129. Stretch limousine compliance with