Amend HB 260 (second reading engrossment) as follows:                        
	(1)  Strike page 13, line 13, through page 14, line 1, and 
substitute the following:
	SECTION 14.  Section 156.401, Family Code, is amended by 
amending Subsections (a) and (d) and adding Subsection (a-1) to 
read as follows:
	(a)  Except as provided by Subsection (a-1) or (b), the court 
may modify an order that provides for the support of a child if:
		(1)  the circumstances of the child or a person affected 
by the order have materially and substantially changed since the 
earlier of:
			(A)  the date of the order's rendition; or                                   
			(B)  the date of the signing of a mediated or 
collaborative law settlement agreement on which the order is based; 
or
		(2)  it has been three years since the order was 
rendered or last modified and the monthly amount of the child 
support award under the order differs by either 20 percent or $100 
from the amount that would be awarded in accordance with the child 
support guidelines.
	(a-1)  If the parties agree to an order under which the amount 
of child support differs from the amount that would be awarded in 
accordance with the child support guidelines, the court may modify 
the order only if the circumstances of the child or a person 
affected by the order have materially and substantially changed 
since the date of the order's rendition.
	(2)  On page 14, line 4, strike "Subsection (a) [(a) (1)]" and 
substitute "this section [Subsection (a) (1)]".
	(3)  On page 14, line 9, strike "156.401(a)" and substitute 
"156.401".
	(4)  On page 14, line 19, strike "156.401 (a)" and substitute 
"156.401".
	(5)  On page 17, lines 3 and 4, strike "The changes in law made 
by this Act to Sections 156.006 and 156.401, Family Code, apply" and 
substitute "The change in law made by this Act to Section 156.006, 
Family Code, applies".
	(6)  On page 17, between lines 8 and 9, insert the following 
appropriately numbered SECTION and renumber subsequent SECTIONS of 
the bill accordingly:
	SECTION      .  The change in law made by this Act to Section 
156.401, Family Code, applies only to a suit for modification 
pending before a trial court on or filed on or after the effective 
date of this Act.
	(7)  Strike SECTION 26 of the bill (page 17, line 17) and 
substitute the following appropriately numbered SECTION:
	SECTION      .  This Act takes effect immediately if it 
receives a vote of two-thirds of all the members elected to each 
house, as provided by Section 39, Article III, Texas Constitution. 
If this Act does not receive the vote necessary for immediate 
effect, this Act takes effect September 1, 2005.