Only that person’s actual authorization determines whether their proposed work may begin.
Track individual status and activities
A shared employer preference or relocation date does not extend the first adult’s permission to the second. Confirm each relevant process and document.
Set a date for the employer to deliver a revised duty description if needed, and a separate date for confirming licence or registration status. Work backward from the earliest date the new authorization could realistically be in hand, not forward from the employer's preferred start date. Preparation and the government's decision are two different steps, and an expected date is not itself permission to begin work. A first review creates a reverse calendar tied to the employer’s actual need, credential delivery dates, and the date the letter can be signed. For a Canadian citizen, TN status generally can be requested at a port of entry without a visa stamp; alternatively, a U.S. employer may file Form I-129. Confirm the final scope and effective work authorization before starting the engagement in the United States.