Ratemaking action documents communicate changes or updates related to rate dockets and regulatory filings. Regulatory agencies and utilities send these transactions to document and track rate modifications, supporting rate case proceedings. The transaction centers on the DK (Docket Header) segment, which identifies the specific regulatory docket, while the SA (Status Action) segment conveys the type of action being taken on that docket. The RA (Rate Header) segment introduces rate-related information, and the nested FK (Factor) segments allow specification of calculation factors that influence the rates under consideration.

For example, the California Public Utilities Commission might send an X12 485 transaction to Pacific Gas & Electric documenting a rate adjustment decision from Docket 24-12-056. The transaction would include the docket identifier in the DK segment, the approval status in the SA segment, and detailed rate components organized through the RA segments. If the rate adjustment involves multiple service categories or charge types, each would be represented through MC (Miscellaneous and Accessorial Charges) segments within the appropriate rate loop, allowing PG&E to extract the precise rate factors and accessorial charges that take effect on the implementation date.