41 C.F.R. § 302-8.1 When may extended storage of HHG be authorized?
Title 41 - Public Contracts and Property Management
Your agency may authorize extended storage of HHG under the following circumstances: (a) Extended storage of HHG may be authorized in lieu of shipment when: (1) You are assigned to an isolated duty station within CONUS (see subpart B of this part); (2) You are assigned to an overseas official station where your agency limits the amount of HHG you may transport to that location; (3) You are assigned to an OCONUS official station and your agency determines extended storage is in the public interest or cost effective to do so; or (4) It is necessary for a temporary change of station (TCS). (b) Extended storage of HHG is not permitted for a career SES employee eligible for last move home benefits.
Title 41: Public Contracts and Property Management
PART 302–8—ALLOWANCES FOR EXTENDED STORAGE OF HOUSEHOLD GOODS (HHG)
Subpart A—General
§ 302-8.1 When may extended storage of HHG be authorized?

