For security clearance, we all know about the FBI fingerprinting and FBI name check. FBI name check is said to have no life span so this can be done first. Fingerprinting has a 15-month life span. There seems to be also two more checks called NAILS check and IBIS check. According the USCIS Adjudicator’s Field Manual, Section 10.3, for any petition, the adjudicator conducts two security checks, called NAILS (National Automated Immigration Lookout System) and IBIS (Interagency Border Information System) check. When the NAILS check is done, the adjudicator is supposed to stamp, “NAILS CHECKED.” The details of these checks are not disclosed to public. I have not found anywhere the life span of the NAILS check. IBIS is said to have a 35 day life span and some approved applications experienced this IBIS check again in stamping where an officer punches keys of an IBIS computer. (When 35 days expire before stamping.)
Thus, before the case gets “adjudication ready”, the logical procedure seems to be chronologically, 1) name check 2) FP 3) NAILS check 4) IBIS check, in this order. Then LUD will change accordingly on the assumption that there is a data entry indicating each security check clearance. Then the case becomes “adjudication ready.” Assuming that each check was done on a different date and there are no “hits”, one should have an average of four LUD changes before it becomes adjudication ready.
Thus, before the case gets “adjudication ready”, the logical procedure seems to be chronologically, 1) name check 2) FP 3) NAILS check 4) IBIS check, in this order. Then LUD will change accordingly on the assumption that there is a data entry indicating each security check clearance. Then the case becomes “adjudication ready.” Assuming that each check was done on a different date and there are no “hits”, one should have an average of four LUD changes before it becomes adjudication ready.