The department may install pay telephones in rest areas along highway routes and at other locations when deemed necessary as a public service for motorists. All pay telephones will be installed under an agreement executed between the department and the telephone company setting forth the responsibilities of each party regarding the installation, operation, and maintenance of the telephone facility. Pay telephone installations shall not be made unless authorized by minute order of the State Highway and Public Transportation Commission.
43 Tex. Admin. Code § 25.3