Mo. Rev. Stat. § 369.149: Mutual associations — liability and rights of members — rejection or limitation on memberships.

The members of a mutual association shall not be responsible for any losses which the association's assets shall not be sufficient to satisfy, and the accounts of members shall not be subject to assessment. Earnings shall be declared in accordance with the provisions of sections 369.010 to 369.369. An association may reject any person as a depositor and may limit from time to time the amounts which may be accepted by the association as deposits.