Amend CSHB 3335 (Senate committee report) by adding the following appropriately numbered SECTIONS to ARTICLE 1 of the bill and renumbering subsequent SECTIONS of that ARTICLE accordingly: SECTION 1.___. Subchapter D, Chapter 36, Water Code, is amended by adding Section 36.1165 to read as follows: Sec. 36.1165. RESTRICTION ON DRILLING OF WELLS NEAR CERTAIN RIVERS AND THEIR TRIBUTARIES. A person may not drill a well in the portion of the territory of a district that is located within 100 feet of the gradient boundary of the Frio, North Llano, South Llano, Llano, West Nueces, Nueces, or San Saba River, or any tributary of one of those rivers that is a perennial stream, unless the well is: (1) exempt from permitting under Section 36.117(b)(1); and (2) drilled, completed, or equipped so that it is incapable of producing more than: (A) 10 gallons of groundwater per minute; or (B) 16 acre-feet of groundwater per year. SECTION 1.___. The changes in law made by Section 36.1165, Water Code, as added by this Act, apply only to a well for which drilling is commenced on or after the effective date of this Act. A well for which drilling is commenced before the effective date of this Act is subject to the law in effect on the date drilling is commenced, and that law is continued in effect for that purpose.