Tex. Local Government Code § 321.044

(a) Concurrent with or at any time before the authorization for issuance of bonds secured by a pledge of the revenues of a designated facility of a park, the board may enter into a contract, including a lease, with any person for the operation of the facility. The contract must specify the consideration or specify the method of determining the consideration. The contract may be for a period determined by the board.

(b) The revenues from the contract may be pledged in the resolution or indenture as security or additional security for the revenue bonds. If the contract is concurrent with the authorization for issuance of the bonds, the revenues constitute the sole or substantially all the security for the bonds.

(c) The contract must require that the rentals, tolls, and charges to be enforced by the lessee for the use or services provided by the facility be sufficient to yield at least in the aggregate money necessary to pay the reasonable operation and maintenance expenses to assure proper operation and maintenance of the facility, plus an amount that will assure income to the board to permit and assure payments into the funds and accounts in the manner, at the times, and in the amounts specified in the resolution.

(d) The contract may provide that the rentals, tolls, and charges may be sufficient to yield a reasonable profit to the other party to the contract, but to be realized only after payment in full of the obligation to the board.

(e) The contract may provide for payment of the annual consideration or rental in approximately equal monthly installments, and that failure to pay any required payment when due may be declared to be a breach of contract entitling the board under rules prescribed in the contract to declare the contract forfeited and to take over the operation and maintenance of the facility. That remedy is cumulative of all others.