AES will accept shipments with outdated 2017 codes during a grace period for 30 days beyond the expiration date of December 31st, 2017. Reporting an outdated 2017 code after the 30-day grace period will result in a fatal error.
The ACE AESDirect program has been updated with the 2018 codes and will accept shipments with outdated 2017 codes during the grace period as well.
The 2018 Schedule B and HTS tables are available for downloading at: http://www.census.gov/foreign-trade/aes/documentlibrary/#concordance
The current list of HTS codes that are not valid for AES are available at: http://www.census.gov/foreign-trade/aes/documentlibrary/concordance/hts-not-for-aes.html