The actual inspection activity needs an appropriate lawful work basis.
Check the spouse’s own authorization
An L spouse who holds the appropriate status is employment-authorized incident to that status once the required evidence is in place. A pending transfer case, unpaid label or family relationship does not itself authorize business inspection work.
List the spouse’s inspection tasks before travel: handling products, approving quality, directing corrections, reporting to the company, or merely observing. An accompanying L-2 spouse is employment-authorized incident to status, but the spouse should first obtain the correct classification and retain evidence of it. A pending petition, family relationship, lack of pay, or a visit does not independently authorize productive work. The principal’s case also must document the required uninterrupted twelve-month foreign employment period, qualifying related organizations that conduct business, and specialized knowledge of company products or advanced company procedures. If the assignment occurs at a customer site, preserve the petitioner’s control and avoid a labour-for-hire arrangement. L-1B time is capped at five years.
Hypothetical example: A pulp-testing process specialist near Petit-Saguenay expects a transfer, while the accompanying spouse is asked to inspect sample lots for the US affiliate before derivative status is settled. The family distinguishes observation from testing, acceptance, and reporting. The spouse declines operational assignments until L-2 status and supporting records are in place. Later, the company documents who supervises any work rather than relying on the marriage. The principal separately supplies internal method histories and foreign employment evidence; neither person’s authorization is assumed from the other’s competence.