Acquisition Decision Authority

Overview
The Acquisition Decision Authority (ADA) is the official responsible for reviewing and approving the movement of acquisitions through the phases of the acquisition life cycle upon satisfaction of applicable criteria at an Acquisition Review Board meeting convened for that purpose. The official designated as the ADA for a particular acquisition differs depending on the level of the acquisition.

Source

 * Department of Homeland Security, Acquisition Management Directive 4 (Directive Number: 102~1) (Jan. 20, 2010) (full-text).