31 Tex. Admin. Code § 1.41
Any headright survey, homestead, donation, pre-emption, scrip, or other survey heretofore awarded or sold, which survey has been held and claimed in good faith by any party for a period of ten years prior to the date of application for patent and which survey cannot be patented under other existing laws, shall be patented when an affidavit of ownership is filed with the General Land Office, along with a chain of title consisting of certified copies of deeds from the original applicant down to and including the present owner, accompanied by a filing fee of $3.00 for each deed. Payment of the purchase price of the land as fixed by the School Land Board shall be made as provided by Texas Civil Statutes, Article 5421c-3, §4. Corrected field notes may be required to be filed at the discretion of the commissioner of the General Land Office.
31 Tex. Admin. Code § 1.41