Do not assume the original permission covers materially different work. Assess the actual new duties and relevant process before the person performs them.
Compare the proposed follow-on activity
Identify its knowledge requirements, entity and supervision. A continued salary or open project account is not unrestricted authorization for any later work.
Compare the revised equipment-readiness date with the worker’s intended duties, housing commitments, foreign payroll arrangements, and remaining maximum stay; the general L-1B maximum is five years, subject to regulatory exceptions and recapture rules. The second involves genuine change: the role develops into managing people or an essential function, and a different classification with a longer ceiling may become appropriate, but only if the duties really changed and the record shows when. Confirm the underlying transfer elements too: one continuous qualifying foreign year within the relevant three years, an active parent, branch, subsidiary, or affiliate relationship, and petitioner control over the assignment. L-1B eligibility still depends on the related organizations, the worker’s required continuous year of qualifying employment abroad inside the applicable three-year lookback, and special or advanced company knowledge used in the assignment. Preserve the corporate link, one continuous full-time year abroad in a managerial, executive, or specialized-knowledge capacity within the relevant preceding three-year period, and, outside the special U.S. new-office rules, both-country operations.