Amend HB 4 by adding the following appropriately numbered 
SECTIONS:        
	SECTION __.  Section 151.355, Tax Code, is amended to read as 
follows:       
	Sec. 151.355.  WATER-RELATED EXEMPTIONS.  The following are 
exempted from taxes imposed by this chapter:
		(1)  rainwater harvesting equipment or supplies, water 
recycling and reuse equipment or supplies, or other equipment, 
services, or supplies used solely to reduce or eliminate water use;
		(2)  equipment, services, or supplies used solely for 
desalination of surface water or groundwater;
		(3)  equipment, services, or supplies used solely for 
brush control designed to enhance the availability of water;
		(4)  equipment, services, or supplies used solely for 
precipitation enhancement;
		(5)  equipment, services, or supplies used solely to 
construct or operate a water or wastewater system certified by the 
Texas Commission on Environmental Quality as a regional system; 
[and]
		(6)  equipment, services, or supplies used solely to 
construct or operate a water supply or wastewater system by a 
private entity as a public-private partnership as certified by the 
political subdivision that is a party to the project; and
		(7)  tangible personal property specifically used to 
process, reuse, or recycle wastewater that will be used in 
fracturing work performed at an oil or gas well.
	SECTION __.  The change in law made by SECTION __ of this Act 
to Section 151.355, Tax Code, does not affect taxes imposed before 
the effective date of this Act, and the law in effect before the 
effective date of this Act is continued in effect for purposes of 
the liability for and collection of those taxes.