42 U.S. Code § 5556 - Solar energy demonstration facilities program
(a) Authorization for design and construction of facilities; objectives
The Chairman is authorized to initiate a program to design and construct, in specific solar energy technologies (including, but not limited to, those listed in section 5555 (c) of this title,  facilities or powerplants of sufficient size to demonstrate the technical and economic feasibility of utilizing the various forms of solar energy. The specific goals of such programs shall include—
(1) production of electricity from a number of powerplants, on the order of one to ten megawatts each;
(5) design and development of hybrid systems involving the concomitant utilization of solar and other energy sources; and
(b) Criteria for determination to proceed from development program to demonstration
For each of the technologies for which a successful and appropriate development program is completed, the Chairman shall make a determination to proceed to demonstration based on criteria including, but not necessarily limited to, the following:
(c) Establishment of one or more projects utilizing each form of solar energy
In carrying out his responsibilities under this section, the Chairman, acting through the appropriate Federal agencies, may provide for the establishment of one or more demonstration projects utilizing each form of solar energy, which shall include, as appropriate, the specific research, development, pilot plant construction and operation, demonstration plant construction and operation, and other facilities and activities which may be necessary to show commercial viability of the specific solar technology.
(d) Investigation and agreements for cooperative development of demonstration facilities
The Chairman, acting through the appropriate Federal agencies, is authorized to investigate and enter into agreements for the cooperative development of facilities to demonstrate solar technologies. The responsible Federal agency may consider—
(1) cooperative agreements with non-Federal entities for construction of facilities and equipment to demonstrate solar energy technologies; and
(e) Construction and operation of demonstration projects without cooperative agreements
The Chairman, acting through appropriate Federal agencies is authorized to construct and operate demonstration projects without entering into cooperative agreements with respect to such projects, if the Chairman finds that—
(1) the nature of the resource, the geographical location, the scale and engineering design of the facilities, the techniques of production, or any other significant factor of the specific demonstration project offers opportunities to make important contributions to the general knowledge of solar resources, the techniques of its development, or public confidence in the technology; and
(2) there is no opportunity for cooperative agreements with any non-Federal entity willing and able to cooperate in the demonstration project under subsection (d)(1) of this section, and there is no opportunity for cooperative agreements with other Federal agencies under subsection (d)(2) of this section.
(f) Additional appropriations for projects exceeding maximum amount
If the estimate of the Federal investment with respect to construction and operation costs of any demonstration project proposed to be established under this section exceeds $20,000,000, no amount may be appropriated for such project except as specifically authorized by legislation hereafter enacted by the Congress.
(g) Disposition of Federal property interests, electricity, synthetic fuels, and other byproducts upon completion of project
(1) At the conclusion of any demonstration project established under this section, or as soon thereafter as may be practicable, the responsible Federal agencies shall, by sale, lease, or otherwise, dispose of all Federal property interests which they have acquired pursuant to this section in accordance with existing law and the terms of the cooperative agreements involved.
 So in original. Probably should be preceded by a closing parenthesis.