That if any area which is located wholly or partly in any main sewer district is incorporated as a city after this act takes effect, the area of any such city which lies within said main sewer district shall continue to be a part of said main sewer district and the governing body of such main sewer district shall have full jurisdiction over such area within the main sewer district for the purpose of carrying out and administering the provisions of this act.
K.S.A. 19-2752d