facilities to which the member is assigned shall be quarters or housing facilities that impose or collect the lowest reasonable lease fee for occupancy that can be obtained for the member by the Secretary concerned for purposes of this subparagraph. (ii) Each Secretary concerned shall provide for the insertion into contracts for the acquisition or improvement of military unaccompanied housing pursuant to subchapter IV of chapter 169 of this title of a clause permitting members covered by this subparagraph to be assigned to such military unaccompanied housing at the lease fee for occupancy obtained by the Secretary concerned pursuant to clause (i) for a period of not more than 150 days. (2) If a spouse and any dependents of a member covered by an election under this section reside in housing of the United States at the beginning of the covered period of relocation, the spouse and dependents may continue to reside in such housing throughout the covered period of relocation, regardless of the date of the member's permanent change of station. (3) If a spouse and any dependents of a member covered by an election under this section are eligible to reside in housing of the United States following the member's permanent change of station, the spouse and dependents may commence residing in such housing at any time during the covered relocation period, regardless of the date of the member's permanent change of station. (e) Basic allowance for housing