Texas Government Code - GOV'T § 2116.017. Pledge of Jointly Held Depository Account

(a) Unless a term of the depository account provides otherwise, a person on whose signature precious metals may be withdrawn from a depository account that is jointly held in the names of two or more persons may, by a signed pledge, pledge and transfer to the depository or to a third party all or part of the account.

(b) A pledge made as described by Subsection (a) does not sever or terminate the joint and survivorship ownership of the account, to the extent applicable to the account before the pledge.