; (2) determining which senior positions within such agency or instrumentality have the authority to separate an at-will employee from service; and (3) ensuring adequate oversight is in place to ensure that any separation of an at-will employee is not a result of discrimination or other violation of any law listed under subsection (b). (g) Definitions In this section: (1) Civil service The term civil service has the meaning given such term in section 2101 of title 5, United States Code. (2) Employee The term employee has the meaning given such term in section 2105 of such title, and includes any officer or employee of the United States Postal Service or the Postal Regulatory Commission. (3) Personnel action The term personnel action has the meaning given such term in section 2302(a)(2)(A) of such title. (4) Veteran The term veteran has the meaning given that term under section 2108(1) of such title. 3. Immediate suspension of employees for misconduct or poor performance (a) In general Chapter 75 of title 5, United States Code, is amended by adding at the end the following: VI Immediate Suspension for Misconduct or Poor Performance 7551. Definitions In this subchapter— (1) the term employee has the meaning given such term in section 7501(1) and includes any employee of the United States Postal Service or the Postal Regulatory Commission, but does not include any at-will employee (as determined under section 2 of the Promote Accountability and Government Efficiency Act)