Okla. Admin. Code § 785:10-1-2
The following words and terms, when used in this Chapter, shall have the following meaning, unless the context clearly indicates otherwise:
"Assessments" mean the charges imposed by any special purpose district for the purposes of the district.
"Board of directors" means the governing body of any special purpose district.
"Directors" mean the directors of any special purpose district.
"Elector" means any person who is of legal voting age or any authorized officer or agent of a corporation, including municipal corporation, providing a copy of resolution of authorization is presented to the Board, and:
(1) Owns at least (10) acres of irrigable land in fee, or
(2) Owns a life estate in at least (10) acres of irrigable land, or
(3) Owns an undivided interest equaling ten (10) acres of irrigable land.
"Special purpose district" means any water district organized under the laws of the State of Oklahoma, i.e., conservancy districts or master conservancy districts; regional water distribution districts; rural water, sewer, gas, solid waste management districts, and irrigation districts.
Okla. Admin. Code § 785:10-1-2