SECTION 4. Section 707.003, Transportation Code, as added by 
this Act, applies only to a contract entered into on or after the 
effective date of this Act.
	SECTION 5. (a) Except as provided by Subsection (b) of this 
section. This Act takes effect September 1, 2007.
	(b) This Act takes effect only if SB 125, Acts of the 80th 
legislature, Regular Session, 2007, is enacted and becomes law.