; (B) shall not be considered to be annual or vacation leave for purposes of section 5551 or 5552 or for any other purpose; and (C) if not used by the employee before the end of the 12-month period (referred to in subsection (a)) to which it relates, shall not accumulate for any subsequent use. (5) The Director of the Office of Personnel Management shall prescribe any regulations necessary to carry out this subsection, including regulations specifying the manner in which an employee may designate any day or other period as to which such employee wishes to use paid leave described in paragraph (1) under subsection (a). (d) The Director of the Office of Personnel Management may promulgate regulations to increase the amount of paid leave available to an employee under subsection (a) to a total of not more than 16 administrative workweeks, based on the consideration of— (1) the benefits provided to the Federal Government of increasing such leave, including enhanced recruitment and retention of employees; (2) the cost to the Federal Government of increasing the amount of such leave; (3) trends in the private sector and in State and local governments with respect to offering an increased amount of paid leave; (4) the Federal Government’s role as a model employer; (5) the impact of increased paid leave under subsection (a) on lower-income and economically disadvantaged employees and their children; and (6) such other factors as the Director considers necessary. . (b) Application The amendment made by this section shall not apply with respect to any event that— (1) is a birth, placement, or other event for which leave may be taken under section 6382(a) of title 5, United States Code