41 C.F.R. § 302-2.100
Establishment of internal policies
The agency head or designee must authorize and approve relocation expenses. Reimbursement of relocation expenses can only be authorized when it is determined that the relocation is in the interest of the Government. Before authorizing a relocation, agencies must set internal policies that address, among other things, all relocation allowances, timelines for relocation travel, who is authorized to approve relocation travel, the availability of counseling to relocating employees, and procedures to ensure compliance of the stated policies.