Chapter 7 debtors who filed their petition in Arkansas (where venue was proper) were required to use Iowa exemptions because they had not been domiciled in Arkansas for 730 days prior to filing pursuant to 11 U.S.C. § 522(b). Iowa is an opt-out state. Because Iowa homestead exemption on its face is not territorial, the Court found that Iowa's homestead law would apply to the debtors homestead located in Arkansas.