; relating to the use of official time). (2) Executive Order 13836 (83 Fed. Reg. 25329; relating to Federal collective bargaining). (3) Executive Order 13839 (83 Fed. Reg. 25343; relating to the Merit Systems Protection Board). (4) The Presidential Memorandum on the Delegation of Certain Authority under the Federal Service Labor-Management Relations Statute, issued to the Secretary of Defense on January 29, 2020.