Texas Government Code - GOV'T § 2116.101. Legal Tender

(1) must be imprinted, stamped, or otherwise marked with the specie's weight and purity and may be imprinted, stamped, or otherwise marked with a name or symbol that identifies a refiner or mint of the specie;  and

(2) except for the information described by Subdivision (1), may not be imprinted, stamped, or otherwise marked with any name, symbol, or other information or design, including any suggestion that the specie has been minted or issued by a government.

(1) restrict the electronic transfer of gold and silver specie or gold and silver currency as legal tender for the payment of a debt;

(2) apply to United States coins or currency issued or recognized under federal law;  or

(3) prohibit or limit the legal tender, acceptance, or use of Federal Reserve notes in the payment of a debt.