ULC Standards is pleased to announce the release of the Second Amendment to the First Edition of CAN/ULC-S566-05, Halocarbon Clean Agent Fire Extinguishers. This is a ULC/UL Harmonized Binational Standard and the requirements contained in CAN/ULC-S566-05, including Amendment 2, are identical to the Second Edition of ANSI/UL 2129, including revisions. The Second Amendment of this Standard has been approved by the ULC Committee on Portable Fire Extinguishers, and has been published with the date of March 30th, 2012. CAN/ULC-S566-05, including Amendment 2, will be of interest to anyone who manufactures, distributes, uses, regulates or inspects fire extinguishers. These requirements cover the construction and performance, exclusive of performance during fire tests, of portable halocarbon clean agent fire extinguishers. Halocarbon clean agent fire extinguishers are intended to be utilized in accordance with the Standard for Portable Fire Extinguishers, NFPA 10 and the National Fire Code of Canada. The requirements for performance during fire testing of halocarbon clean agent fire extinguishers are specified in the Binational Standard for Rating and Fire Testing of Fire Extinguishers, ANSI/UL 711 CAN/ULC-S508. Amendment 2 to this Standard includes revisions to clarify cylinder requirements with TDGR (Transportation of Dangerous Goods Regulations) and DOT (Department of Transportation) specifications.