Mo. Rev. Stat. § 475.543: Effect of registration.

1. Upon registration of a guardianship or protective order from another state, the guardian or conservator may exercise in this state all powers authorized in the order of appointment except as prohibited under the laws of this state, including maintaining actions and proceedings in this state and, if the guardian or conservator is not a resident of this state, subject to any conditions imposed upon nonresident parties.

2. A court of this state may grant any relief available under sections 475.501 to 475.555 and other law of this state to enforce a registered order.