; and (ii) any additional paid vacation or sick leave provided by such employer. (C) Substitution An employee may elect to substitute for any leave under subsection (a)(1) any other paid leave which is available to such employee for that purpose. The previous sentence shall not be construed to require that an employee first use all or any portion of the other paid leave before being allowed to use the paid family leave described in this subsection. (D) Additional rules Paid family leave under subsection (a)(1)— (i) shall be payable from any appropriation or fund available for salaries or expenses for positions with the Government Accountability Office