(a) An account established by one or more parties at a financial institution that is not designated as a convenience account, but is instead designated as a single-party account or another type of multiple-party account, may provide that the sums on deposit may be paid or delivered to the parties or to one or more convenience signers "for the convenience of the parties."
(b) Except as provided by Section 113.1541:
(1) the provisions of Sections 113.105, 113.206, and 113.208 apply to an account described by Subsection (a), including provisions relating to the ownership of the account during the lifetimes and on the deaths of the parties and provisions relating to the powers and duties of the financial institution at which the account is established; and
(2) any other law relating to a convenience signer applies to a convenience signer designated as provided by this section to the extent the law applies to a convenience signer on a convenience account.
Official text of the Texas Estates Code as published by the Texas Legislative Council.