; (6) in subsection (f)— (A) in the heading of such subsection, by striking and substitution of hours and inserting during regular time; absences during scheduled overtime ; and (B) by adding at the end the following: (5) Application (A) Limitation on substitution Notwithstanding paragraph (1), scheduled overtime (as described in paragraph (2)(A)(ii) or (3)(A)(ii) of subsection (b)) may not be substituted for leave without pay on a day when a border patrol agent has a full day of leave without pay. (B) Leave without pay As provided in paragraphs (2)(A)(ii) and (3)(A)(ii) of subsection (b), a border patrol agent shall incur no scheduled overtime obligation on a day when the agent has a full day of leave without pay. ; and (7) by adding at the end the following: (h) Alternative work schedules (1) In general Notwithstanding any other provision in this section or section 6101, U.S. Customs and Border Protection may assign a border patrol agent an alternative work schedule as described in this subsection, subject to any regulations prescribed by the Director of the Office of Personnel Management. No alternative work schedule may be established under subchapter II of chapter 61. (2) Level 2 border patrol agent A border patrol agent receiving a level 2 border patrol rate of pay may, in lieu of the standard work schedule described in subsection (b)(3)(A), be assigned to an alternative work schedule under the following terms and conditions: (A) The alternative work schedule shall be a regular tour of duty consisting of 9 workdays per biweekly pay period, with— (i) 8 workdays including 9 hours of regular time per workday and 1 additional hour of scheduled overtime for each day the agent performs work during regular time