Do not rely on an unresolved arrangement as authorization. Have the actual facts and applicable process assessed before starting the work.
Preserve uncertainty openly
A planned future clarification is not current permission.
Begin the licensure file as soon as the destination state is settled, because verification from an institution or a home-jurisdiction regulator involves third parties. Starting a longer-term process too early, or alongside a TN renewal, can create questions about consistency that are avoidable with better timing. Build a dated review file around the intended start date, current authorization record, employer changes, travel plan, and any I-129 filing evidence. The admission or petition decision is made at the time of the actual request, and a weather- or season-dependent business deadline does not shorten or bypass that process. An employer's start date sets when the role is expected to begin; whether work may lawfully begin is decided by the authorization steps, and no filing or application permits work while it is pending. Confirm the final scope and effective work authorization before starting the engagement in the United States.