Texas Property Code - PROP § 11.004. Duty of Recorder

(1) correctly record, as required by law, within a reasonable time after delivery, any instrument authorized or required to be recorded in that clerk's office that is proved, acknowledged, or sworn to according to law;

(2) give a receipt, as required by law, for an instrument delivered for recording;

(3) record instruments relating to the same property in the order the instruments are filed;  and

(4) provide and keep in the clerk's office the indexes required by law.