(a) A referendum to establish an eradication zone, to establish an eradication program in an existing eradication zone, to add a county or area to an existing eradication zone, to transfer an area or county from one statutory eradication zone to another, to discontinue the program in an eradication zone, or to set an assessment rate must pass by a favorable vote of at least two-thirds of those voting on the referendum or a favorable vote of growers who farm more than 50% of the total acreage of cotton in the relevant eradication zone or area. The total acreage of cotton in each zone or area shall be determined by use of the latest available figures from the Texas office of the United States Department of Agriculture Farm Service Agency.(b) A retention referendum conducted under the Texas Agriculture Code (Code), §74.114, and a referendum or proposition included in a referendum to approve use of a third-party contractor to carry out an eradication program, must pass by majority vote of growers voting.(c) If an eradication zone or program establishment, assessment, or retention referendum conducted under the Code, §74.114, is not approved, the department may not conduct another referendum in the same area on that same issue before one year after the date of the election on the failed referendum. In addition, if an eradication zone is not established or is discontinued, any concurrent board member election has no effect, and the commissioner shall appoint a board member to represent the eradication zone in which the election was held.(d) If a discontinuation referendum conducted under the Code, §74.112, is not approved, no such referendum may be held within two years of any other referendum in the eradication zone pertaining to establishing or discontinuing the eradication zone.(e) After the commissioner has certified the referendum and board election and issued certificates of election to any elected board members, those members may act in accordance with the powers provided to them by the Code, Chapter 74, Subchapter D.