Mo. Rev. Stat. § 475.336

If no local conservator has been appointed and no petition in a conservatorship proceeding is pending in this state, a domiciliary foreign guardian, curator, committee or conservator may file with a court of a county in this state in which property belonging to the minor or disabled person is located, authenticated copies of his appointment and of any official bond he has given. Thereafter, he may exercise as to assets in this state all powers of a local conservator and may maintain actions and proceedings in this state subject to any conditions imposed upon nonresident parties generally.