(a) In the application of section 3132, a “career reserved position” in the Internal Revenue Service means a position designated under section 3132(b) which may be filled only by—
(b)
(1)
The number of positions described under subsection (a) which are filled by an appointee as described under paragraph (2) of such subsection may not exceed 10 percent of the total number of Senior Executive Service positions in the Internal Revenue Service.
(2) Notwithstanding section 3132—