Amend CSHB 3335 by adding the following:                                     
	SECTION __.  DEFINITION.  In this Act, "commission" means 
the Texas Commission on Environmental Quality.
	SECTION __.  STUDY.  (a)  The commission shall conduct a 
study regarding the impact on the entire Carrizo-Wilcox aquifer of 
rules and plans adopted by groundwater conservation districts in 
whose boundaries the aquifer is located and of determinations made 
by groundwater conservation districts in connection with the joint 
planning process relating to groundwater management areas in whose 
boundaries the aquifer is located.  In conducting the study, the 
commission shall examine:
		(1)  whether the rules and plans adopted by each 
groundwater conservation district:
			(A)  are based on sound scientific principles;                               
			(B)  adequately conserve and protect the aquifer 
and ensure the achievement of the applicable desired future 
condition for each part of the district; and
			(C)  are likely to affect other groundwater 
conservation districts or groundwater management areas;
		(2)  whether each district is enforcing substantial 
compliance with its rules;
		(3)  whether the desired future conditions established 
under Section 36.108, Water Code, in each groundwater management 
area are reasonable and based on sound scientific principles, and 
whether the rules adopted by each district are designed to achieve 
the applicable desired future condition;
		(4)  other long-term impacts of the applicable rules 
and plans on the aquifer, taking into consideration:
			(A)  projected population and agricultural, 
municipal, and industrial demands for water from the aquifer within 
the groundwater conservation districts; and
			(B)  other appropriate factors as determined by 
commission rule; and       
		(5)  whether the presence of contaminants in the 
recharge area of the aquifer and the potential pollution of the 
aquifer are issues that should be addressed and, if so, by whom.
	(b)  The Texas Water Development Board and the Bureau of 
Economic Geology of The University of Texas at Austin shall assist 
the commission in conducting the study under this section.
	(c)  The commission may contract with any appropriate person 
to assist the commission in conducting the study under this 
section.
	SECTION __.  REPORT.  Not later than December 31, 2012, the 
commission shall report the results of the study conducted under 
this Act to the governor, the lieutenant governor, the speaker of 
the house of representatives, and the standing committees in the 
senate and the house of representatives that have primary 
jurisdiction over natural resources.  The report may include the 
commission's recommendations for legislation to address any areas 
of concern.
	SECTION __.  NO APPROPRIATION.  This Amendment does not make 
an appropriation.  A provision in this Act that creates a new 
governmental program, creates a new entitlement, or imposes a new 
duty on a governmental entity is not mandatory during a fiscal 
period for which the legislature has not made a specific 
appropriation to implement the provision.
	SECTION __.  EXPIRATION.  The provisions contained in this 
amendment expire August 31, 2013.