(2) The commissioner shall, within available appropriations, adopt regulations pursuant to chapter 54 regarding the affordability plan. Such regulations may include additional criteria for preparing an affordability plan and shall include: (A) A formula for determining rent levels and sale prices, including establishing maximum allowable down payments to be used in the calculation of maximum allowable sales prices; (B) a clarification of the costs that are to be included when calculating maximum allowed rents and sale prices; (C) a clarification as to how family size and bedroom counts are to be equated in establishing maximum rental and sale prices for the affordable units; and (D) a listing of the considerations to be included in the computation of income under this section.
(c) Any commission, by regulation, may require that an affordable housing application seeking a change of zone include the submission of a conceptual site plan describing the proposed development's total number of residential units and their arrangement on the property and the proposed development's roads and traffic circulation, sewage disposal and water supply.