Do not assume existing permission covers any new arrangement. Have the actual change and required process assessed before relying on the placement.
Resolve substantive conditions early
A preferred client deadline does not remove either offsite limitation or the underlying L requirements.
The order that works is: settle the commercial contract with the client so it describes the company's deliverable, then write the specialized-knowledge case around the employee's role in delivering it, then file. Establish the qualifying corporate relationship, collect foreign-employment proof, complete the knowledge explanation, and resolve any client-site control issue before the planned filing date. L-1B placement with an unaffiliated organization cannot be a labour-for-hire arrangement; the petitioner should retain control, and the work should principally involve the petitioner’s specialized knowledge rather than ordinary services directed by the customer. Premium processing shortens USCIS adjudication but does not replace preparation or guarantee approval, and the customer's deadline does not change the legal standard. Keep anticipated delivery capacity separate from existing resources, and reassess changed duties instead of assuming the original teaching plan covers them.