History: Below is a listing of the Revisions and Changes made to this UFGS.

KEYPREPARING ACTIVITY (PA)A ArmyN NavyF Air ForceS NASA [ARCHIVED]
ACTIONN NewR RevisionC ChangeD Deletion
Release PA Action Change # Nature of Change or Revision
Aug-2025 A C 1

Incorporated various CCRs..

May-2021 A C 3 This change aligns PVT requirements with Navy testing processes and eliminates an extraneous tailoring option. Deleted subpart 1.8.11 and corresponding submittal item in response to CCR 9532. Updated subpart 3.10 in response to CCR 9365.
Feb-2020 A C 2 Incorporated changes to accommodate new requirements for an exception to the use of open protocols within specific system types when certain criteria are met.
Nov-2019 A C 1 Added new paragraph 1.1.1 to accommodate a recent change in Navy policy.
Feb-2019 A R Complete review and update.
Feb-2019 A R Complete review and update.
Aug-2018 A C 2 Corrected tailoring tags in response to CCR 6663.
Nov-2017 A C 1 Updated tailoring option for Navy jobs with an Acceptance Engineer.
Nov-2015 A N Superseding UFGS 23 09 23 LONWORKS DIRECT DIGITAL CONTROL FOR HVAC AND OTHER BUILDING CONTROL SYSTEMS and UFGS 23 09 23.13 20 BACnet DIRECT DIGITAL CONTROL SYSTEMS FOR HVAC