41 CFR § 302-8.2 - What is the purpose of extended storage?
The purpose of extended storage is to assist in protecting personal items when you are:
(a) Authorized a temporary change of station (TCS) under § 302-3.400 of this chapter;
(b) Assigned to isolated locations in CONUS to which the employee cannot take or at which the employee is unable to use his/her HHG and personal effects because of the absence of residence quarters at that location,
(c) Assigned OCONUS when:
(1) The official station is one to which you cannot take or at which you are unable to use your HHG and your personal effects; or
(2) The head of your agency authorizes storage of your HHG is in the public interest or is more economical than transporting; or
(d) Storage is necessary during school recess for DoDDS teachers.