1. Short title This Act may be cited as the Compressed Gas Cylinder Safety and Oversight Improvements Act of 2023 . 2. Regulation of foreign manufacturers of cylinders used in transporting hazardous materials (a) Definitions In this section: (1) Cylinder The term cylinder means any cylinder specified under any of sections 178.36 through 178.68 of title 49, Code of Federal Regulations (or successor regulations). (2) Foreign manufacturer of cylinders; fmoc The term foreign manufacturer of cylinders or FMOC means an entity that manufactures cylinders outside of the United States that are intended to be represented, marked, certified, or sold as qualified for use in transporting a hazardous material in commerce in the United States. (3) In good standing The term in good standing , with respect to an FMOC, means that the FMOC— (A) is approved by the Secretary pursuant to section 107.807 of title 49, Code of Federal Regulations (or a successor regulation); and (B) has demonstrated 3 years of compliance with— (i) part 107 of title 49, Code of Federal Regulations (or successor regulations)