Illinois Statutes Chapter 205. Financial Regulation § 625/3. Trust Account Incidents

(a) If two or more persons are designated trustees of the account, as between them they shall hold the account and all balances therein which exist from time to time as joint tenants with right of survivorship and not as tenants in common;

(b) Any trustee during his or her lifetime may change any of the designated beneficiaries without the knowledge or consent of the other trustees or the beneficiaries by a written instrument accepted by the institution;

(c) Any trustee may make additional deposits to and withdraw any part or all of the account at any time without the knowledge or consent of the other trustees or the beneficiaries, subject to the bylaws and regulations of the institution, and all withdrawals shall constitute a revocation of the agreement as to the amount withdrawn; and

(d) Upon the death of the last surviving trustee the designated beneficiary (i) who is then living, if the beneficiary is a natural person, or (ii) that maintains a lawful existence under the state or federal authority pursuant to which it was organized, if the beneficiary is not a natural person, shall be the sole holder of the account, unless more than one beneficiary is named and then living or in existence, in which case said beneficiaries shall hold the account in equal shares as tenants in common. If no beneficiary is then living or in existence, the proceeds shall vest in the estate of the last surviving trustee.