No. A billing date is not work authorization. Confirm the status and process that permit the proposed activities before relying on the commercial schedule.
Separate delivery milestones from immigration steps
Record where the work would be performed and the intended admission or status dates. Application, approval and admission have different effects depending on the procedure. Do not assume that invoicing through Canada permits physical U.S. work. Agree on how the client will handle a delayed start without presenting the agreement’s timetable as an official processing promise.
Put the final scope, evidence dates, travel, and requested start on one calendar. Hypothetical example: a fisheries-traceability adviser’s client changes the seasonal launch scope twice. The signed scope and real reporting relationship settle the role more reliably than a desired launch date. Lock the commercial description before choosing an admission or petition procedure. Physical U.S. work should not begin merely because invoicing or planning occurs from Canada. Do not treat an optimistic business explanation, a later-created letter, or a family arrangement as proof of a missing eligibility fact. Confirm authorization before any in-person work begins.