The licensing agency shall provide by rules and regulations for the licensing of adult care homes in any one or more complete floors of a building, or any one or more complete wings of a building, or any one or more complete wings and one or more complete floors of a building, in addition to licensing of adult care homes in entire buildings. In the case of adult care homes in less than an entire building, the licensing agency shall prescribe acceptable use and occupancy of the balance of such building, and shall prohibit those uses and occupancies which are deemed to be contrary to the public interest.