No. Each person’s entry, status and activities still require the appropriate assessment. Short duration does not itself create work or study permissions.
Check the individual activity
Qualifying L spouses are employment authorized incident to status with appropriate documentation. Children do not receive work permission solely through L dependent status. Review actual plans and authorized stays instead of relying only on the company’s end date.
An L-2 spouse is employment-authorized incident to status, so employment is permitted without a separate work permit, and evidence of that status is what an employer verifies. A short posting still generates its own paperwork trail: entry records, any required travel documents and, for a working spouse, evidence of status, and skipping that trail to save time tends to cost more time later if questions come up. Confirm what admission basis actually supports the trip for each person before departure rather than assuming a brief stay needs no separate review. Ask whether any travel document held by a dependent needs its own renewal, since an expiring document can complicate even a short trip regardless of the reason for travel. Coordinate the planned activities, work, school or simple accompaniment, with the classification that actually supports them, instead of assuming a short company timeline covers everyone by default. Note the exact admission basis in writing immediately after entry, while the details are still fresh, rather than trying to reconstruct them later from memory.