Multifamily residential dwellings (townhomes, apartments, or condominiums) and retail/commercial uses integrated as a cohesive development. A minimum of two acres of the total site shall be retail/commercial uses to provide a range of employment, shopping, and dining opportunities for residents within close proximity to the proposed development. Multifamily residential developments shall be developed at a minimum density of 12 dwelling units per acre and a maximum density of 28 dwelling units per acre subject to the adoption of a specific plan that provides development standards (setbacks, building heights, parking ratios, etc.), architectural standards, and affordability ratios. Mixed use or residential developments on parcels of land that are less than one acre is size shall be constructed at a maximum density of 20 dwelling units per acre.