For the purposes of NRS 539.237, 539.240, 539.243, 539.297, 539.380, 539.397, 539.410, 539.417, 539.433, 539.465, 539.545, 539.557, 539.577, 539.587 and 539.690, a special election may be held at any time upon the unanimous vote of the board of directors of an irrigation district.