New Mexico Statutes Chapter 73. Special Districts § 73-20-21. Addition of land

A. Any one or more owners of land may petition the board of supervisors to have their lands added to a watershed district. The petition shall define the boundaries of the land desired to be annexed, the number of acres of land involved and other information pertinent to the proposal. When the boundary described embraces lands of others than the petitioners, the petition shall so state and shall be signed by twenty-five or more of the landowners in the territory described, if fifty or more such owners are involved, or by a majority if fewer than fifty landowners are involved.

B. Within thirty days after the petition is filed, the board shall cause due notice to be given as provided in Section 73-20-8 NMSA 1978 of a hearing on the petition. All interested parties shall have a right to attend the hearing and be heard. The board shall determine whether the lands described in the petition or any portion of them shall be included in the district. If all the landowners in the territory involved are not petitioners, a referendum shall be held within the territory in accordance with the provisions of the Local Election Act  1. If it is determined by the qualified electors of the district that the land should be added, this fact shall be certified by the board of supervisors to the county clerk in the county involved. After recording, the certification shall be filed with the New Mexico department of agriculture.