Preservation of affordable housing; definitions; civil penalty. Creates a framework for localities to preserve affordable housing by exercising a right of first refusal on publicly supported housing, defined in the bill. The bill authorizes localities to implement an ordinance that requires an owner to accept a right of first refusal offer by the locality or qualified designee, defined in the bill, in order to preserve affordable housing for a period of not less than 15 years. The bill requires that any locality adopting such an ordinance to preserve affordable housing submit an annual report to the Department of Housing and Community Development by December 31.