Texas Local Government Code - LOC GOV'T § 323.009. Participation With A County

(a) The commissioners court of a county that has established a county library may contract with the commissioners court of another county to extend county library privileges to the residents of the other county to the extent and for the consideration as the parties may agree. The consideration received from the other county shall be deposited in the county free library fund. On the making of the contract, the library privileges are extended to the residents of the other county.

(b) The other county may provide for a county free library fund in the same manner in which a county that establishes a county library may provide for the fund. The purpose of the fund is to carry out a contract made by the other county under Subsection (a).

(c) If the other county makes a contract under Subsection (a), it is not prohibited from establishing its own county library under this subchapter, and if it does so, it may terminate the contract on mutually agreeable terms or may continue under the contract until expiration of its term.