When used in connection with an established facility operated by one Service for joint use by two or more Services, principal operational interest indicates a requirement for the greatest use of, or the greatest need for, the services of that facility. The term may be applied to a Service, but is more applicable to a command.
PRINCIPAL OPERATIONAL INTEREST
Meaning of PRINCIPAL OPERATIONAL INTEREST in English
DOD English dictionary of military terms. Английский словарь военных терминов DOD. 2012