By: Giddings H.B. No. 3839 A BILL TO BE ENTITLED AN ACT relating to grounds for modification of child support. BE IT ENACTED BY THE LEGISLATURE OF THE STATE OF TEXAS: SECTION 1. Amend section 156.401 of the Family Code section (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 10 [20] percent or $50 [$100] from the amount that would be awarded in accordance with the child support guidelines. SECTION 2. This Act takes effect September 1, 2011.