In reference to ACS Query Functionality to be Turned Off, CSMS# 18-000188, which had been announced for a date of March 31st, 2018, a new deployment date is planned for next Thursday, April 19th, 11:00 AM ET. 
READ FULL CSMS POST HERE.
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CBP will expand its definition of "importer" under Importer Security Filing (ISF) regulations.
​This final rule adopts a proposed amendment to expand the definition of an Importer Security Filing (ISF) Importer, the party that is responsible for filing the ISF, for certain types of shipments. This rule is effective May 14, 2018.
READ THE​ COMPLETE ARTICLE HERE.

The data extracts function in ACE will be removed on April 14th. CBP said in a CSMS message, "The data found in these extracts can be found in either the entry Summary universe or the Statements universe." 
CLICK HERE TO READ POST.