To update operating instructions, previously issued in Training and Employment Guidance Letter (TEGL) No. 24-20 to State Workforce Agencies or agencies designated by Governors as “Cooperating State Agencies” (CSAs or “states”) regarding the allowability for Trade Adjustment Assistance (TAA) Program funds for employment and case management services under the reversion provisions of the Trade Adjustment Assistance Reauthorization Act of 2015 (TAARA 2015) and the Trade Adjustment Assistance Reform Act of 2002 (TAARA 2002).  This Change 1 revises the operating instructions that apply to the use of funds and on the provision of employment and case management services  to adversely affected workers covered by petitions filed on and after July 1, 2021.  This version of the TAA Program is described herein as “Reversion 2021.”