28 Tex. Admin. Code § 7.1403
(a) Person and place for service. Except as provided by subsection (b) and subsection (c) of this section, a domestic insurance carrier, including a casualty, county mutual, farm mutual, fire, fraternal, life, Lloyd's, mutual other than life, reciprocal, stipulated premium, or title insurance company, and any mutual assessment company, carrier providing job protection insurance, risk retention group, third party administrators (in accordance with the Insurance Code, Article 21.07-5), group hospital service corporation, health maintenance organization, prepaid legal services corporation, and exempt association under the Insurance Code, Article 14.17, authorized to conduct the business of insurance in this state, and any other company domiciled in Texas and engaged in the business of insurance as a principal, may be served with legal process, notice, or demand required or permitted by law by:
Source Note:The provisions of this §7.1403 adopted to be effective August 11, 1989, 14 TexReg 3690.