Tex. Health & Safety Code § 534.153

A health maintenance organization created and operating under this subchapter is governed as, and is subject to the same laws and rules of the Texas Department of Insurance as, any other health maintenance organization of the same type. The commissioner of insurance may adopt rules as necessary to accept funding sources other than the sources specified by Section 843.405, Insurance Code, from a nonprofit health maintenance organization created and operating under this subchapter, to meet the minimum surplus requirements of that section.