Review whether the actual US assignment and the knowledge it requires have changed.
Describe the work that will really begin
An older launch schedule should not stand in for current duties. Preserve the material change and assess any effect on the proposed transfer rather than promising a fixed immigration outcome.
Gathering and organizing internal procedure documentation typically takes longer than a straightforward petition, so preparation should begin well ahead of any planned transfer date. Provide proposed or effective changes promptly, with the actual dates and records, so implications can be assessed before travel or reliance on the revised arrangement. US doing business of less than one year requires new-office treatment: sufficient premises, financial ability to pay the employee and begin business, and an initial approval no longer than one year. Evidence must still establish a qualifying corporate relationship, one continuous eligible foreign year in the previous three, and specialized company knowledge required by the American assignment. L-1B requires qualifying specialized-knowledge work, a parent, branch, subsidiary, or affiliate, and one continuous year of full-time work physically abroad within the relevant preceding three-year period. A longer stay at the same worksite doing the same duties raises different questions from a move to a client site the employer does not control, or from duties that drift toward work outside the specialized knowledge described.