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Amend HB 2129 by amending Section 1 to read as follows:                      
	SECTION 1.  Chapter 388, Health and Safety Code, is amended 
by adding Section 388.012 to read as follows:
	Sec. 388.012.  DEVELOPMENT OF ALTERNATIVE ENERGY-SAVING 
METHODS.  The laboratory shall develop at least three alternative 
methods for achieving a 15 percent greater potential energy savings 
in residential, commercial, and industrial construction than the 
potential energy savings of construction that is in minimum 
compliance with Section 388.003.  The laboratory shall consider the 
use of indirect evaporative cooling with an integral economizer.  
The alternative methods:
		(1)  may include both prescriptive and 
performance-based approaches, such as the approach of the United 
States Environmental Protection Agency's Energy Star qualified new 
home labeling program; and
		(2)  must include an estimate of:                                      
			(A)  the implementation costs and energy savings 
to consumers; and  
			(B)  the related emissions reductions.