Standardized PDs are different from Army-wide standard/model descriptions in that they are proposed and developed by HQDA Principal Officials, MACOMs, FOAs, DRUs, and/or Staff Support Agencies specifically for use within an identified function or organization. They are classified by managers with Delegated Classification Authority or by designated Civilian Personnel Operations Center classification specialists. After standardized PDs are reviewed and established, the initiating HQDA functional program manager, MACOM, or other organization generally releases the position descriptions for implementation. Standardized PDs are developed to consolidate, generically describe and replace a number of individual PDs that are similar or identical. Standardized PDs are not subject to review, approval or release by HQDA CP, although such review and concurrence is recommended. They may be uniquely numbered and may cover positions throughout the Army. However, their use is limited to positions within the functional or organizational purview of the initiating office, command, or agency. Within that population they are used in place of locally established individual descriptions, and usually may not be modified or amended without approval of the initiating office. The process for establishing standardized PDs is not prescribed in the IDEF.