Amend CSHB 300 (House committee printing) in ARTICLE 3 of the bill by adding the following appropriately numbered SECTION to that article and renumbering the remaining SECTIONS of that article accordingly: SECTION 3.____. The change in law made by this Act to Subchapter E, Chapter 228, Transportation Code, applies only to a contract for the construction of a highway or segment of a highway that the Texas Department of Transportation enters into on or after the effective date of this Act. A contract for the construction of a highway or segment of a highway entered into before the effective date of this Act is governed by the law in effect on the date the contract was entered into, and that law is continued in effect for that purpose.