K.S.A. 19-27a10

If any main sewer is located so that it receives or may receive sewage from more than one district, the board may provide that the cost of the main sewer below a designated point be divided among the districts in proportion to the benefit received. The proportion of the cost shall be assessed against the district as provided by K.S.A. 19-27a07 . The board shall: (a) Designate the point in the line of the main sewer below which the provisions of this section apply; (b) describe the proposed location of the main sewer from such point to the outlet of the same or to the county boundary; (c) state the method of the payment of the cost of the main sewer by the benefiting districts; and (d) the proportion of the cost to be assessed against each district.