In the event that no low or moderate income purchaser is found within 90 days, after the unit is listed for sale with a realtor and the township is notified in writing of such listing, the low income unit may be sold to a moderate income purchaser or, if none is available, to any interested purchaser and the moderate income unit to any interested purchaser. Proof of the attempt to sell shall be submitted to and shall be satisfactory to the housing administrator. Resale controls shall remain in effect for any subsequent resales and subleases in accordance with applicable law.