requirement for use of solar energy systems

requirement for use of solar energy systems Sec. 804. (a) Effective ninety days after the date of the enactment of this Act, the Secretary of Defense shall require that 25 per centum, 92 STAT. 586 based on the estimated dollar value of the construction cost, of all new facilities except family housing that are placed under design shall include solar energy systems to the extent that engineering analyses demonstrate is cost effective. (b) Effective on the date of the enactment of this Act, the Secretary of Defense shall require that all family housing authorized for construction shall include solar energy systems to the extent that engineering analyses demonstrate is cost effective. (c) For the purposes of this section, a solar energy system shall be considered to be cost effective if the original investment cost differential can be recovered over the expected life of the facility.