All installations and changes to traffic control devices along designated routes of the state highway system shall be at the expense of the department except under the following conditions.
  (1) When provisions of an agreement executed with local jurisdictions delegate responsibilities for installation and/or maintenance of the traffic control devices to others.
  (2) When a particular device requested by local officials within cities or individuals outside of incorporated cities is not deemed necessary by the department for the regulation, warning, or guidance of motorists, but the requested device could be installed in accordance with the Texas Manual on Uniform Control Devices and without adverse effect on motorist safety, the department may install said device at the expense of others.
  (3) When a guide sign change is required on the main lanes of a freeway, the cost of the change may be charged to others when the following conditions are satisfied:
    (A) the facility on which the change is requested has already been signed to interstate standards;
    (B) the requested sign change involves the addition of a name for a previously unnamed road or street, or a change in the name of a city street or county road which resulted from the official action of the city or county governing body;
    (C) the requested change in name cannot be accomplished within the available space on the existing sign or requires changes in the sign support;
    (D) the requested sign changes are requested to be made prior to the time the affected signs require maintenance replacement.
  (4) The department may place at the expense of others signs of a temporary nature requested to be erected on a highway route for a special event provided the following conditions are satisfied.
    (A) The design and size of temporary signs are approved by the department.
    (B) No signs of this nature will be installed which will in any way interfere with other traffic control devices.
    (C) The signs will be placed only for such times and in such locations as approved by the department.
    (D) No signing of this nature will be considered unless it can be clearly shown that such signs will be necessary for guidance of a large number of motorists to a destination open to the general public and will not adversely affect the safety of the motoring public.
    (E) Temporary signs which are not reusable on a regular basis and which would be needed for less than one month shall be furnished by others at no cost to the department.
  (5) The department may authorize the placement of special signs by others within highway rights-of-way, when necessary as a service to the motoring public, where the following conditions are satisfied.
    (A) The design and size of special signs shall be approved by the department.
    (B) The signs will be placed only for such times and in such locations as authorized by the department.
    (C) No special signs shall be authorized for installation which will in any way interfere with other traffic control devices or be for a destination not open to the general public.

Source Note: The provisions of this §25.6 adopted to be effective January 1, 1976; amended to be effective July 19, 1976, 1 TexReg 1849.