Tex. Nat. Res. Code § 52.179

If oil or gas should be produced in paying quantities upon any land included in this law, the owner of the permit shall report the development to the commissioner within 30 days thereafter and apply for a lease upon such whole surveys or tracts in each permit as the owner or owners of a combination of permits may desire to be leased, and accompany the application with a log of the wells, and the correctness of the log shall be sworn to by the owner, manager, or driller, and thereupon a lease shall be issued without the payment of any additional sum of money and for a period not to exceed 10 years, subject to renewal or renewals.