(a) The board may not finance a service or improvement project under this chapter with assessments unless a written petition requesting that service or improvement has been filed with the board.(b) The petition must be signed by:(1) the owners of 50 percent of the assessed value of the property in the district subject to assessment based on the most recent certified county tax appraisal roll; or(2) the owners of 50 percent or more of the surface area of the district subject to assessment, excluding roads, streets, highways, and utility rights-of-way, based on the most recent certified county tax appraisal roll. Added by Acts 2005, 79th Leg., Ch. 729 (H.B. 2019), Sec. 1.03, eff. April 1, 2007.Amended by: Acts 2009, 81st Leg., R.S., Ch. 889 (S.B. 2552), Sec. 8, eff. June 19, 2009.