(a) The board shall study and must approve all methods used to control brush under this chapter considering the overall impact of the project.
(b) The board may approve a method for use under the cost-sharing program provided by Subchapter E if the board finds that the proposed method:
(1) has proven to be an effective and efficient method for controlling brush;
(2) is cost efficient;
(3) will have a beneficial impact on the development of water sources and wildlife habitat;
(4) will maintain topsoil to prevent erosion or silting of any river or stream; and
(5) will allow the revegetation of the area after the brush is removed with plants that are beneficial to stream flows, groundwater levels, and livestock and wildlife.