Have the revised duties and arrangement assessed before assuming the initial L-1B plan still fits. Identify the knowledge now required.
Explain changes before work begins
Provide the new scope, supervision and locations where relevant. A continuing customer relationship does not establish that materially different work has already been reviewed or authorized. Keep commercial deadlines separate from immigration permission.
Explain what changed in the process, training or assignment and which expertise remains relevant. Do not treat another approval date as permission to begin your own US assignment before the required authorization is established. Do not assume all demonstrations are merely meetings or that a customer’s fixed date removes the need for qualifying employment and lawful permission. Build the schedule from the fixed points: the date the employee completes one continuous year of qualifying employment abroad within the preceding three years, the date the internal evidence is actually assembled, and realistic adjudication times, noting that premium processing changes decision speed only. Separate information gathering from hands-on diagnosis, code changes, configuration, or customer delivery, and obtain advice about the employee’s location and existing status. The underlying transfer still needs a qualifying related organization, a continuous qualifying foreign year within the preceding three, and company-specific specialized knowledge. Plan as well around the L-1B five-year maximum rather than assuming that changed duties restart the classification clock.