Texas Insurance Code - INS § 2703.001. Compliance with Title and Rules

(a) This section applies to a corporation organized under this title, a foreign corporation, and, to the extent that the corporation is engaged in the business of title insurance, a corporation organized under another law, including:

(b) A corporation operates in this state under the control and supervision of the commissioner and under uniform rules adopted by the commissioner relating to:

(c) With respect to real property located in this state, a corporation may not issue any kind of title insurance coverage, any kind of guarantee, or reinsurance of a risk assumed under a title insurance policy, except as provided by Section 2551.305 or 2551.3055, unless the corporation is authorized to engage in the business of title insurance under this title and otherwise complies with this title.  In engaging in the business of title insurance with respect to real property located in this state, the corporation shall comply with this title and rules described by Subsection (b), including when:

(d) Title insurance coverage, reinsurance, or a guarantee issued in violation of Subsection (c) is invalid.