The district shall be a nonprofit, public corporation, and no part of its net earnings remaining after payment of its expenses shall inure to the benefit of any individual, firm, or corporation; except, that in the event the board of directors of the board shall determine that sufficient provision has been made for the full payment of the expenses, bonds, and other obligations of the district, any net earnings of the corporation thereafter accruing shall be paid to the appointing government or as otherwise provided in the articles of incorporation or proceedings with respect to the bonds.