work assignment in the Department for all purposes. The written agreement established under subsection (b)(1) shall address the specific terms and conditions related to the employee’s continued status as a Federal employee. (2) In establishing a temporary assignment of an employee of the Department to a private-sector organization, the Secretary shall— (A) ensure that the normal duties and functions of such employee can be reasonably performed by other employees of the Department without the transfer or reassignment of other personnel of the Department