Training completion is not immigration authorization and does not settle the other L-1 requirements.
Check the actual assignment after training
Confirm the foreign-employment record, entities, duties and applicable worksite conditions. A training date cannot substitute for the necessary decision and admission or status steps.
Preparation begins with an internal request for the documents that support the knowledge claim, and that request nearly always uncovers gaps: a protocol whose author has left, a validation report filed under an old system, a training record kept on paper. A delayed equipment commissioning date at the U.S. plant changes when the specialized-knowledge work can actually begin, and the petition or status timeline should be reassessed against the real schedule rather than the original one. L-1B still requires company-specific special or advanced knowledge, one continuous qualifying year of employment abroad within the preceding three years, a qualifying organizational relationship, and ongoing business abroad plus either U.S. business or compliance with the initial new-office requirements. Identify which facts require fresh review and whether further filings are needed before the new activity begins, and keep the actual approval and status dates visible rather than relying on an external delivery deadline.