Final answer:
Cal-OSHA requires that Safety Data Sheets state when revisions are made to ensure that the most current safety information is available to workers and emergency personnel.
Step-by-step explanation:
True, Cal-OSHA requires that Safety Data Sheets (SDSs), previously known as Material Safety Data Sheets (MSDSs), must state when any revisions are made. According to Cal-OSHA regulations, chemical manufacturers, distributors, or importers must provide an SDS for each hazardous chemical to downstream users to communicate information on these hazards. The SDS must include a revision date section that indicates the last time the sheet was updated, typically found in Section 16 of the SDS. If there have been any significant new data since the last revision that would affect the hazard classification or if there are changes to the protective measures, the SDS must be updated. The purpose is to ensure that the most current safety information is available to workers and emergency personnel.