(1)
(A) An employee who completes at least 18 months of civilian service creditable under section
8411 and has become disabled shall be retired on the employees own application or on application by the employees agency.
(B) For purposes of this subsection, an employee shall be considered disabled only if the employee is found by the Office to be unable, because of disease or injury, to render useful and efficient service in the employees position.
(2)
(A) Notwithstanding paragraph (1), an employee shall not be eligible for disability retirement under this section if the employee has declined a reasonable offer of reassignment to a vacant position in the employees agency for which the employee is qualified if the position
(i) is at the same grade (or pay level) as the employees most recent grade (or pay level) or higher;
(ii) is within the employees commuting area; and
(iii) is one in which the employee would be able to render useful and efficient service.
(B) An employee who is applying for disability retirement under this subchapter shall be considered for reassignment by the employees agency to a vacant position described in subparagraph (A) in accordance with such procedures as the Office shall by regulation prescribe.
(C) An employee is entitled to appeal to the Merit Systems Protection Board under section
7701 any determination that the employee is not unable, because of disease or injury, to render useful and efficient service in a position to which the employee has declined reassignment under this section.
(D) For purposes of subparagraph (A), an employee of the United States Postal Service shall not be considered qualified for a position if such position is in a different craft or if reassignment to such position would be inconsistent with the terms of a collective-bargaining agreement covering the employee.