under subsection (a), the amount of basic allowance for housing payable may be based on whichever of the following areas the Secretary concerned determines to be the most equitable: (A) The area of the duty station to which the member is reassigned. (B) The area in which the spouse or other dependent resides, but only if the spouse or other dependent resides in that area when the member departs for the duty station to which the member is reassigned, and only for the period during which the spouse or other dependent resides in that area. (C) The area of the former duty station of the member, but only if that area is different from the area in which the spouse or other dependent resides. (c) Rule of construction related to certain basic allowance for housing payments Nothing in this section shall be construed to limit the payment or the amount of basic allowance for housing payable under section 403(d)(3)(A) of this title to a member whose request under subsection (a) is approved. (d) Housing treatment education The regulations prescribed pursuant to this section shall ensure the relocation assistance programs under section 1056 of title 10 include, as part of the assistance normally provided under such section, education about the housing treatment available under this section. (e) Definitions In this section: (1) Covered relocation period (A) Subject to subparagraph (B), the term covered relocation period , when used with respect to a permanent change of station of a member of the armed forces, means the period that— (i) begins 180 days before the date of the permanent change of station