For the purpose of this chapter—
(1)
“agency” means—
(A)
an Executive agency or part thereof; and
(B)
an office or officer in the executive branch;
but does not include the Government Accountability Office or the Comptroller General of the United States;
(2)
“reorganization” means a transfer, consolidation, coordination, authorization, or abolition, referred to in section
903 of this title; and
(3)
“officer” is not limited by section
2104 of this title.