In the case of any position which is critical to the functionality of the information technology operations of the Internal Revenue Service—

((1)) , United States Code, shall be applied—

((A)) by substituting “during the period beginning on the date of the enactment of section 7812 of the Internal Revenue Code of 1986, and ending on ” for “Before in subsection (a)” ,

((B)) without regard to subparagraph (B) of subsection (a)(1), and

((C)) by substituting “the date of the enactment of the Taxpayer First Act” for “” in subsection (a)(6),

((2)) section 9504 of such title 5 shall be applied by substituting “During the period beginning on the date of the enactment of section 7812 of the Internal Revenue Code of 1986, and ending on ” for “Before ” each place it appears in subsections (a) and (b), and

((3)) section 9505 of such title shall be applied—

((A)) by substituting “During the period beginning on the date of the enactment of section 7812 of the Internal Revenue Code of 1986, and ending on ” for “Before ” in subsection (a), and

((B)) by substituting “the information technology operations” for “significant functions” in subsection (a).