34 Tex. Admin. Code § 125.7
If a participating municipality provides by ordinance that persons who hold and are regularly engaged in the performance of duties of an elective office that normally requires actual performance of services in a participating department of the municipality for not less than 1,000 hours a year are employees required to become members of the retirement system pursuant to §852.107 of the Act, then the system may require the municipality to provide information regarding the municipality's charter, budgets, departmental organization and similar information regarding the department in which the elective officials serve, in addition to providing certification of employee contributions based on compensation in accordance with the Act.
34 Tex. Admin. Code § 125.7