Tex. Utilities Code § 43.052

An electric utility that owns and operates facilities to provide middle mile broadband service may lease excess fiber capacity on the electric utility's electric delivery system or other facilities to an Internet service provider on a wholesale basis and shall charge the Internet service provider for the use of the electric utility's system for all costs associated with that use. The rates, terms, and conditions of a lease of excess fiber capacity described by this section must be nondiscriminatory. An electric utility may not lease excess fiber capacity to provide middle mile broadband service to an affiliated Internet service provider.