Section 2.6 - Designation of first assistants(a) Every office within the Department to which appointment is required to be made by the President with the advice and consent of the Senate ("PAS Office") may have a First Assistant within the meaning of 5 U.S.C. 3345-3349d . (1) Where there is a position of principal deputy to the PAS Office, the principal deputy shall be the First Assistant.(2) Where there is only one deputy position to the PAS Office, the official in that position shall be the First Assistant.(3) Where there is more than one deputy position to the PAS Office, and this part establishes which deputy is delegated the authority to perform all the duties and exercise all the powers of the PAS Office during the absence or unavailability of the PAS official, the deputy delegated such authority shall be the First Assistant.(4) Where neither paragraph (a)(1), (2), nor (3) of this section is applicable to the PAS Office, except as provided in paragraph (b) of this section, the Secretary may designate in writing the First Assistant position.(b) The Inspector General of the Department shall determine any arrangements for the temporary performance of the functions and duties of the Inspector General when that office is vacant. 81 FR 45963 , July 15, 2016