NCIS has authority to investigate allegations that DON civilian or military personnel have committed major crimes, which are defined in SECNAVINST 5520.3B (Criminal and Security Investigations) as those offenses for which imprisonment for more than one year may be imposed under the UCMJ or federal, state, or local laws (such crimes often are referred to as felonies). Although IG organizations often investigate standards of conduct violations, many of the standards are derived from Federal felony statutes (see, for example, Office of Government Ethics Regulations at 5 CFR 2635.401 through 503 for a discussion of conflicts of interest based on a criminal statute, 18 USC 208, and conflicts based on agency regulations). In those cases, NCIS should be apprised of the allegations before the IG investigation proceeds. When NCIS has reason to believe the cognizant United States Attorney will not prosecute a case, it may decline jurisdiction in order to permit an IG investigation to proceed. When a matter appropriate for an IG investigation must be referred to NCIS for investigation pursuant to SECNAVINST 5520.3B, the IG organization should log the case into its tracking system and monitor the progress of the NCIS investigation. Should the NCIS investigation fail to establish a basis for criminal prosecution, NCIS may return the action to the IG organization for such further investigation as may be necessary to permit the responsible authority to determine whether non-criminal (judicial or administrative) action is appropriate.