IN THIS GUIDE · Review the knowledge assignment when the client or supervision changes
Start with the L-1B eligibility and application overview
Explain the knowledge needed now
The standard covers special knowledge of the organization’s products, services, research, equipment, techniques, management or other interests and their application in international markets, or advanced knowledge or expertise in its processes and procedures. A new customer name does not itself establish or eliminate that knowledge. Compare the previous statement of work with the current customer assignment. Identify which product or process remains the same, which implementation problem is new, and whose account confirms the actual work. A changed customer may leave the knowledge claim intact while changing supervision or worksite conditions that require separate review. Do not assume the existing description still fits merely because the employee’s title is unchanged. Preserve both versions so the material differences can be assessed from real duties and control rather than a revised customer name alone.
Check the actual foreign history
Generally the worker needs one continuous qualifying year abroad within the relevant preceding three years. Document the employee’s own duties and locations. A revised U.S. placement cannot cure a missing foreign period.
Apply both offsite limitations
For work principally at an unaffiliated employer’s site, L-1B is unavailable if that employer principally controls and supervises the worker, or if the arrangement is essentially labor for hire rather than a placement connected with the petitioner’s product or service requiring specialized knowledge. Retaining payroll alone does not answer either question.
Keep the group and launch evidence current
The qualifying relationship and continuing international business remain necessary. New-office L-1B also requires sufficient premises and financial ability to pay the worker and begin business; it is not assessed by importing L-1A’s managerial-role standard.
Complete the foreign-employment and new-office assessment
The qualifying foreign employment generally must be one continuous full-time year within the relevant preceding three years. Its capacity may be managerial, executive or specialized knowledge under the ordinary L rule; the proposed U.S. role has its own category test. Brief U.S. trips do not necessarily interrupt continuity, but U.S. days do not count toward the foreign year. The qualifying group must provide goods or services regularly, systematically and continuously in the United States and at least one other country throughout the relevant stay; registration alone is insufficient. A U.S. organization doing business for less than one year is a new office. L-1B then requires sufficient premises and financial ability to pay the employee and begin business; initial approval is limited to one year.
Show the employee’s knowledge rather than the department’s history
Specialized knowledge need not be unique worldwide, and a labour-market search is not the governing test. A watershed framework developed in house, with version history, internal training records and client deliverables that depend on it, is the kind of proprietary methodology the category contemplates. Explain what the applicant learned about the company’s methods and how that knowledge is applied. A specialist installing and commissioning the company's own patented system at customer marinas, directed by the affiliate's own management, using its methods and reporting to its supervisors, fits that requirement. Do not claim that every externally taught skill is disqualifying or that all knowledge must be unique or proprietary. Unique or proprietary knowledge is not universally required, and a labour shortage is not a universal eligibility requirement. The useful record is usually a training history, controlled procedure, technical decision, or project file that connects the employee’s knowledge to the organization rather than to a common software product.
Sources reviewed 2026-09-07. This guide covers a preparation focus; it is not an individual eligibility assessment.