No deadline itself grants permission. Assess the actual required steps and authorization before relying on the schedule.
Keep the assignment current
If the employer, customer arrangement or duties change, explain the real proposal rather than only changing the delivery date.
Seasonal work in process industries generates pressure to have paperwork ready months in advance, and that pressure encourages applications built on an outline rather than an offer. Allow time for the evaluator to review the foreign program, request any missing records, and issue a report, then time for the employer to confirm whether licensing applies. Work backward from the employer’s last workable start date, allowing time to obtain the contract, citizenship proof, and the credential evidence required by the selected USMCA profession. Once a turnaround date is confirmed with the U.S. facility, the support letter, credential evidence and duty description should be finalized well before travel, so the officer reviewing the case at entry has a complete file rather than a promise that documents will follow. A Canadian citizen may generally request TN admission at a port of entry, which is quick when the file is complete and immediate in the other direction when it is not; an employer petition on Form I-129 is an alternative with its own processing time.