(1) The territorial limits of the watershed management area may be enlarged by the annexation of additional real property thereto:
(a) By petition and consent of the fee owner pursuant to sections 32-11.5-602 and 32-11.5-606;
(b) By petition of the eligible electors pursuant to sections 32-11.5-603, 32-11.5-604, and 32-11.5-606;
(c) By action initiated by the district pursuant to sections 32-11.5-605 and 32-11.5-606 with the consent of the governing body of each county or municipality that includes any of the real property to be annexed; or
(d) By petition by the governing body of each county or municipality that includes any of the real property to be annexed.