The following words and phrases, as used in this Division, have the following meanings: Affordability Period means the time an MPDU is subject to resale price controls and owner occupancy requirements. Area Media Income means the median household income for the Washington, DC metropolitan area as estimated by the U.S. Department of Housing and Urban Development. Consumer Price Index means latest published version of the Consumer Price Index for All Urban Consumers (CPI-U) for the Washington-Arlington-Alexandria Core Based Statistical Area (CBSA), as published by the United States Department of Labor, Bureau of Labor Statistics, or any similar index selected by the DHCD Director. Department means the Department of Housing and Community Development. Director, except as otherwise indicated, means the Director of the Department of Housing and Community Development. Moderately-priced Dwelling Unit or MPDU means a dwelling unit which is offered for sale to eligible households through the Department and sold under this Division. Planning Area means one of 36 subareas of the County defined in the earliest planning documents by the Maryland-National Capital Park and Planning Commission and whose boundaries have not changed over time.