; (2) a train transporting— (A) 20 or more loaded tank cars of a Class 2 material or a Class 3 flammable liquid in a continuous block; or (B) 35 or more loaded tank cars of a Class 2 material or a Class 3 flammable liquid throughout the train consist; or (3) a train with a total length exceeding 7,500 feet. (d) Statutory construction Nothing in this section shall be construed to supersede or preempt any provision of State or local law that provides for minimum crew requirements in excess of the 2-person crew requirements established under this section. . (c) Clerical amendment The analysis for subchapter II of chapter 201 of title 49, United States Code, is amended by inserting after the item relating to section 20153 the following: 20154. Freight train crew size safety standards. . 4. Safety regulations for train operations (a) Rulemaking Not later than 1 year after the date of the enactment of this Act, the Secretary of Transportation shall issue regulations, or modify existing regulations, establishing safety requirements, in accordance with subsection (b), with which a shipper or rail carrier operating a train transporting hazardous materials that is not subject to the requirements for a high-hazard flammable train under section 174.310 of title 49, Code of Federal Regulations, shall comply with respect to the operation of each such train and the maintenance of specification tank cars. (b) Requirements The regulations issued pursuant to subsection (a) shall require shippers and rail carriers— (1) to provide advance notification and information regarding the transportation of hazardous materials described in subsection (a) to each State emergency response commissioner, the Tribal Emergency Response Commission, or any other State or Tribal agency responsible for receiving the information notification for emergency response planning information; (2) to include, in the notification provided pursuant to paragraph (1), a written gas discharge plan with respect to the applicable hazardous materials being transported