Facility Access and Shipment Tracking (FAST®) Release 16.1 will be deployed to the Production environment on Sunday, May 1, 2011. The FAST® Production system will not be available from 4 a.m. through 8 a.m. (CDT) on Sunday, May 1, 2011. FAST 16.1 Release Notes and a new job aid (Retrieving 99M Barcode Data from Mail.XML®) will be posted on the FAST website (Resources/Reference Documents section) on May 1. FAST Release 16.1 will deploy to the Test Environment for Mailers (TEM) on Monday, May 2, 2011. The FAST TEM system will not be available from 8 a.m. through 12 Noon (CDT) on Monday, May 2, 2011.