Texas Transportation Code - TRANSP § 341.004. Statement of Location;  Priority

(a) Not later than the 90th day after the date the building of a structure begins, the individual, corporation, or association that owns the structure shall file for record with the clerk of the county in which the greater part of the structure is located:

(b) The right of the individual, corporation, or association to build the structure relates back to the time of the filing of the statement and the map, and the first individual, corporation, or association to file has priority over a subsequent filing.