15-32-106. Procedure for obtaining benefit of deduction. The department of revenue shall approve a deduction under 15-32-103 that demonstrably promotes energy conservation or uses a recognized nonfossil form of energy generation. The department of revenue may refer a deduction involving energy generation to the department of environmental quality for its advice, and the department of environmental quality shall respond within 60 days. The department of revenue may refer a deduction involving energy conservation to the department of labor and industry for its advice, and the department of labor and industry shall respond within 60 days. The department of revenue may deny a deduction that it finds to be impractical or ineffective.