28 Tex. Admin. Code § 3.4304
The acceleration-of-life-insurance benefit provision may require a medical diagnosis of conditions and/or documentation of care or confinement as defined in the life insurance contract to establish eligibility for acceleration-of-life-insurance benefits. This may include a written medical opinion, satisfactory to the company, that the insured has a terminal illness, a long-term care illness, or a specified disease. If additional diagnoses by a physician selected by the company are required, the acceleration-of-life-insurance benefit provision, or a disclosure statement attached to the front of the policy or rider, must specify that the additional diagnoses are at the expense of the company and how conflicting diagnoses will be reconciled. The specific standards sufficient to meet such eligibility requirements shall be defined in the life insurance contract, and any acceleration-of-life-insurance benefit shall be conditioned only upon such requirement or requirements as defined.
28 Tex. Admin. Code § 3.4304