1. After a watershed subdistrict has been organized and the organization tax pursuant to section 278.250 has been levied, any county in the subdistrict which has not adopted the annual tax pursuant to section 278.250 may detach from the subdistrict upon approval of such detachment of a majority of the qualified voters voting on the proposed detachment within such subdistrict in such county; however, before such detachment the watershed district trustees shall make arrangements for the county to pay any outstanding indebtedness for services or works of improvement rendered by the subdistrict in such county.

2. Following the entry in the official minutes of the trustees of the watershed district of the detachment of the county, the watershed district trustees shall certify this fact on a separate form, authentic copies of which shall be recorded with the recorder of deeds in each county in which any portion of the watershed subdistrict lies and with the state soil and water districts commission.