(a) For each project for which a project analysis is prepared under Subchapter D and for which architectural or engineering design choices will affect the energy-efficiency of the building, the commission or the private design professional retained by the commission shall prepare a written evaluation of energy-efficient architectural or engineering design alternatives for the project.
(b) The evaluation must include information about the economic and environmental impact of various energy-efficient architectural or engineering design alternatives, including an evaluation of economic and environmental costs both initially and over the life of the architectural or engineering design.
(c) The evaluation must identify the best architectural and engineering designs for the project considering both economic and environmental costs and benefits.