Have the actual requested activity and status implications assessed before assuming the earlier trip plan covers it. Urgency does not create work permission.
Do not rely on the original label
Explain whether the request changes meetings into operational duties or otherwise alters the visit. A corporate instruction is not an immigration authorization. Keep the proposed L employment subject to the appropriate steps.
A new-office approval is best understood as a period in which to create the proof that the extension will require. Within one unreset period of L status, L-1B and L-1A time is combined, and a fresh petition or a different employer does not by itself restart the clock. Review the actual role, status period and applicable procedure using the changed facts. Use the actual operational plan and immigration readiness rather than assume those dates must be identical. Once filed, the petition waits in the USCIS queue unless the employer pays for premium processing, which produces a decision in a defined number of business days. Count actual work and identify unpaid leaves, entity changes, or gaps needing explanation.