Source: U.S. Customs and Border Protection –
On December 12, 2016, U.S. Customs and Border Protection (CBP) published in the Federal Register a document announcing CBP’s plans to modify and clarify the National Customs Automation Program (NCAP) test regarding Post-Summary Correction (PSC) claims to entry summaries that are filed in the Automated Commercial Environment (ACE), as well as the Periodic Monthly Statement (PMS) test. The notice liberalized and eliminated some requirements needed for the filing of PSCs; however, it also placed burdens on the importer in the form of a restriction and a prohibition.
Subsequently, CBP decided to remove the restriction imposed on all PSC filings to make payments within three business days of submitting the PSC, with the exception of entry type 03 filings, and to remove the prohibition of filing additional PSCs until additional duties, fees and taxes are deposited. CBP amendments republish and supersede the document published on December 12 with these corrections and clarifications. Except to the extent expressly announced or modified by this document, all aspects, rules, terms and conditions announced in notices previous to this notice and the December 12 publication regarding the tests remain in effect. The changes made by this amendment notice are effective January 14, 2017.
More information can be found here.