Yes. If an ISF importer elects to use any of the flexible filing options provided for under the interim final rule, the ISF must be updated with the action reason code of CT to denote the correct or more accurate information as soon as it is known, but in any event no later than 24 hours prior to arrival of the vessel in the first U.S. port.

One of the following action reason codes must be provided as part of an ISF-10 filing:

CT: “Compliant Transaction” – All required data is present and accurate based on the best information available at the time of filing. No special flexibility rules apply. The ISF can be updated if necessary, but updates are not necessarily expected. CT is also used to finalize a FR, FT, or FX filing.

FR: “Flexible Range” – A range of data for the Manufacturer, Ship To Party, Country of Origin, and/or Commodity HTSUS number has been provided. The ISF must be updated with better information as soon as it becomes available, but in any case, no later than 24 hours prior to arrival. CBP expects a timely update for filings marked FR.

FT: “Flexible Timing” – The CS (consolidator name/address) and/or the LG (stuffing location) has not been provided. The ISF must be updated with better information as soon as it becomes available, but in any case, no later than 24 hours prior to arrival. CBP expects a timely update for filings marked FT.

FX: “Flexible Range and Flexible Timing” – A range of data as described in FR has been provided, and the CS (consolidator name/address) and/or LG (stuffing location) have not been provided. The ISF must be updated with better information as soon as it becomes available, but in any case, no later than 24 hours prior to arrival. CBP expects a timely update for filings marked FX.