The 2027 edition of the standard includes new definitions for the terms battery energy storage system and lithium-based battery with associated annex material. Updates have been made in Section 6.2 to align with NFPA 1 regarding 1A and 1B flammable gases and to further clarify that Category 1B has a lower flammability than Category 1A flammable gases. Updates have been made in Annex B for occupational exposure limits to direct users to exposure limits from other regulatory bodies and industry organizations. Annex C has been updated to include the current list of flash point standards as listed in ASTM E502. New text has been added to provide an explanation of how ASTM E1232 provides information on flash point errors, as well as an explanation on the use of ASTM E502 for corrections on changes in atmospheric pressures.