Tex. Ins. Code § 1952.056

A personal automobile insurance policy or any similar policy form adopted or approved by the commissioner under Article 5.06 or filed under Subchapter B, Chapter 2301, that covers liability arising out of ownership, maintenance, or use of a motor vehicle of a spouse who is otherwise insured by the policy must contain a provision to continue coverage for the spouse during a period of separation in contemplation of divorce.