; and (ii) that includes— (I) the commencement and termination dates of the required service period (or provisions for the determination thereof); (II) the amount of the bonus; and (III) other terms and conditions under which the bonus is payable, subject to the requirements of this subsection, including— (aa) the conditions under which the agreement may be terminated before the agreed-upon service period has been completed; and (bb) the effect of a termination described in item (aa). (4) Rules for bonuses (A) Maximum bonus A bonus paid to an employee under— (i) paragraph (2) may not exceed 100 percent of the annual rate of basic pay of the employee as of the commencement date of the applicable service period; and (ii) paragraph (3) may not exceed 50 percent of the annual rate of basic pay of the employee as of the commencement date of the applicable service period. (B) Relation to basic pay A bonus paid to an employee under paragraph (2) or (3) shall not be considered part of the basic pay of the employee for any purpose. (5) OPM oversight The Director shall, to the extent practicable— (A) set aside a determination of the Secretary under this subsection if the Director finds substantial evidence that the Secretary abused the discretion of the Secretary in making the determination; and (B) oversee the compliance of the Secretary with this subsection. (d) Special pay authority In addition to the circumstances described in subsection (b) of section 5305, the Director may establish special rates of pay in accordance with that section if the Director finds that the recruitment or retention efforts of the Secretary with respect to positions for CBP employees in an area or location are, or are likely to become, significantly handicapped because the positions are located in a rural or remote area for which the Secretary has identified a direct relationship under subsection (b)(1)(B) of this section between— (1) the rural or remote nature of the area