U.S. Legal Permanent Residence is also available to retiring G-4 Principals with a minimum of 15 years in aggregate G-4 status and 3½ years of minimum physical presence within the 7 years preceding application via a Special Immigrant Visa (SIV) Petition. Spouses also may apply concurrently, and do not need to have been G-4 visa holders themselves.
These SIV Applications must be filed within 6 months of the formal retirement date, and unfortunately does not include non-retirement events such as resignation, termination or divorce resulting in loss of G-4 status. Spouses may not apply independently of, or prior to, the G-4 principal.
SIV Applications are, however, available to surviving spouses of G-4 visa holders when the G-4 principal passes away so long as the deceased G-4 principal met the 3½ years of minimum physical presence within 7 years and 15 years of aggregate G-4 status preceding their death. The SIV Application must be filed within 6 months of death of the principal G-4.