Reassess the professional classification and evidence using the clarified duties.
Update the proposal consistently
Do not preserve an earlier blended description after the employer provides materially different facts. A clarification may change the assessment without guaranteeing a particular decision or start date.
Sequence preparation around facts that can change. Obtain the final employer letter only after the role, supervisor, pay, location, and expected duration are settled; then check whether the degree, licence, and citizenship documents still match that version. A first review should produce a dated list of dependencies, such as a pending licence, an expiring passport, or an amendment to the commercial agreement. Avoid relying on a start date to force an answer to an unresolved profession question. A changed duty mix can require a fresh assessment even if the title stays the same. Canadian applicants outside the country may request classification during border inspection, while the relevant I-129 route can be appropriate in other circumstances; neither procedure turns an unqualified role into a qualifying one. TN also does not permit a professional to use the category for a US enterprise that the professional controls. Hypothetical example: an entomologist is scheduled to begin pest-surveillance work on April 1, but the final contract shifts half the assignment to warehouse scheduling. The document that settles the timing decision is the executed contract, not the original recruitment email. If the professional work is no longer primary, pause and revise the route assessment before anyone relies on the announced start date.