Section 3906 - Boards of district supervisors; composition; term(a) There shall be a board of supervisors for each district, each board to consist of 4 elected supervisors, an optional supervisor who, in Kent County shall be a member of the Levy Court, in Sussex County shall be a member of County Council, and in New Castle County, shall be the County Executive or the County Executive's designated representative, and 2 optional supervisors who shall not be farmers and who may be appointed by the Secretary of the Department of Natural Resources and Environmental Control upon the request of the district involved. The vote and authority of each supervisor shall be equal. The county agricultural agent shall serve as secretary to the board but shall have no vote.(b) The elected members of the Kent and Sussex districts shall be farmers residing in those respective counties. In New Castle County, 2 of the elected supervisors shall be farmers residing in the southern portion of the County, and the remaining 2 who shall not be farmers, shall reside in the northern portion of the County, according to a division established by the Secretary of the Department of Natural Resources and Environmental Control. (c) The term of office of each elected supervisor shall be 4 years. The term of office of a supervisor appointed by the Secretary of the Department of Natural Resources and Environmental Control shall be 3 years. An optional supervisor appointed by the Kent County Levy Court and the Sussex County Council shall hold office during the pleasure of that body so long as that optional supervisor remains a member of the appointing body. The Secretary of the Department of Natural Resources and Environmental Control may fill the vacancy of any elected supervisor, or supervisor appointed by the Secretary of the Department of Natural Resources and Environmental Control occurring otherwise than by expiration of term, by appointment of a qualified individual to serve the remainder of the unexpired term.44 Del. Laws, c. 212, § 6; 7 Del. C. 1953, § 3907; 54 Del. Laws, c. 188, § 2; 55 Del. Laws, c. 462, § 1; 57 Del. Laws, c. 739, § 171; 65 Del. Laws, c. 362, §1; 70 Del. Laws, c. 186, § 1; 77 Del. Laws, c. 95, §§ 1, 2.;