Texas Transportation Code - TRANSP § 441.156. Authorized Investments

(1) a direct obligation of or obligation guaranteed directly or indirectly by the United States;

(2) an obligation, debenture, note, or other evidence of indebtedness issued or guaranteed directly or indirectly by the Association for Cooperatives, Federal Home Loan Association System, Export-Import Association of the United States, Federal National Mortgage Association, Federal Home Loan Mortgage Corporation, Farmers' Home Administration, Tennessee Valley Authority, Farm Credit System, or Government National Mortgage Association, or by successor agencies;

(3) an obligation issued by a public agency or municipality and fully secured as to the payment of principal and interest by a pledge of annual contributions under an annual contributions contract with the United States;

(4) a temporary note, preliminary loan note, or project note issued by a public agency or municipality that is fully secured as to the payment of principal and interest by a requisition or payment agreement with the United States;

(5) a direct or general obligation of or obligation guaranteed by this state if the payment of the principal and interest is a general obligation of this state;

(6) a demand deposit or interest-bearing time deposit, certificate of deposit, or other similar banking arrangement that is made with a member of the Federal Deposit Insurance Corporation, if the deposit, to the extent not insured to its full amount, is fully secured by obligations of the types specified by Subdivision (1), (2), (3), (4), (5), (9), or (10) that have a fair market value at least equal at all times to the amount of the deposit;

(7) a repurchase agreement with a bank that is a member of the Federal Deposit Insurance Corporation or with a member of the Public Securities Association, if the underlying securities are of the type described by Subdivision (1) or (2) and each is fully secured at all times by obligations of the same type that have a fair market value, including accrued interest, at least equal to the amount of the repurchase agreement including accrued interest;

(8) an interest-bearing time deposit or repurchase agreement with an agency or intermediary of the United States and that is described by Subdivision (1) or (2);

(9) an obligation of this state, another state of the United States, a nonprofit corporation, or an instrumentality of this state, another state, or a nonprofit corporation, if at the time of its purchase under the indenture, the obligation is rated in one of the two highest letter-rating categories by a nationally recognized securities credit rating agency; and

(10) an obligation issued by a political subdivision of this state, another state of the United States, a nonprofit corporation, or an instrumentality of this state, another state, or a nonprofit corporation, that is rated in one of the two highest letter-rating categories by a nationally recognized securities credit rating agency.