Pursuant to an energy efficiency assessment performed under Section 6-21D-3 N.M. Stat. Ann. and with the approval of the department, a state agency or school district may install or enter into contracts for the installation of energy efficiency measures on the building identified in the assessment. An installation contract shall be entered into pursuant to the Procurement Code N.M. Stat. Ann. § 13-1-28 to 13-1-199, except that the contract may be entered into for a term of up to ten years. The installation or contracts shall address provisions concerning payment schedules, monitoring, inspecting, measuring and warranties as are necessary to ensure that the energy efficiency measures will be installed and the energy cost savings realized in the manner most beneficial to the state; provided that bonds shall not be issued pursuant to the Energy Efficiency and Renewable Energy Bonding Act without a finding by the department that the energy cost savings realized from the energy efficiency measures will be greater than the debt service due on the bonds issued to finance the energy efficiency measures.