Notwithstanding the foregoing, the Administrative Agent may, upon approval by the municipality, and subject to the Division's approval, permit a moderate-income purchaser to buy a low-income unit if and only if the Administrative Agent can demonstrate that there is an insufficient number of eligible low-income purchasers in the housing region to permit prompt occupancy of the unit and all other reasonable efforts to attract a low-income purchaser, including pricing and financing incentives, have failed. Any such low-income unit that is sold to a moderate-income household shall retain the required pricing and pricing restrictions for a low-income unit. Similarly, the administrative agent may permit low-income purchasers to buy very-low-income units in housing markets where, as determined by the Division, units are reserved for very-low-income purchasers, but there is an insufficient number of very-low-income purchasers to permit prompt occupancy of the units. In such instances, the purchased unit must be maintained as a very-low-income unit and sold at a very-low-income price point such that on the next resale the unit will still be affordable to very-low-income households and able to be purchased by a very-low-income household. A very-low-income unit that is seeking bonus credit pursuant to N.J.S.A. 52:27D-311.k(9) must first be advertised exclusively as a very-low-income unit according to the Affirmative Marketing requirements at N.J.A.C. 5:80-26.16, then advertised as a very-low-income or low-income unit for at least 30 additional days prior to referring any low-income household to the unit.