Most of the 96 national monuments designated under U.S. law
are on land. The majority are managed by the National Park
Service, though some are administered by the Bureau of Land
Management and other agencies. At this point neither the
name of the proposed Mariana Trench Marine National Monu-
ment (MTMNM) nor the management structure has been de-
termined. For guidance one could review the process of the
recently designated Papahanaumokuakea Marine National
Monument (PMNM), which is placed within the purview of the
National Oceanic and Atmospheric Administration (NOAA)
for budgetary purposes.