The sanitary commission of a district with 2 member counties consists of at least: One sanitary commissioner from each member county appointed as the articles of incorporation of the district provide; and One sanitary commissioner from either member county as the articles of incorporation of the district provide. The sanitary commission of a multiple county district with at least 3 member counties consists of a number of sanitary commissioners equal to at least the number of member counties. The sanitary commission of a district that adds an incoming member county consists of: The sanitary commissioners in office before the admission of the incoming county; and At least one sanitary commissioner from the incoming county. A sanitary commissioner of a multiple county district shall be a resident of the member county from which the sanitary commissioner is appointed. If a member county withdraws from a district, the term of each sanitary commissioner who was appointed from that county ends when the withdrawal is effective. Except for the term of the first sanitary commissioner who represents each incoming county admitted to a district, the term of a sanitary commissioner in a multiple county district is the lesser of: 6 years; or The term provided in the articles of incorporation of the district. The term of the first sanitary commissioner from an incoming county admitted to a district is 6 years. The terms of sanitary commissioners in a multiple county district are staggered as required by the articles of incorporation of the district. At the end of a term, a sanitary commissioner in a multiple county district continues to serve until a successor is appointed and qualifies. A sanitary commissioner in a multiple county district who is appointed after a term has begun serves only for the rest of the term and as required by the articles of incorporation of the district.