Review the actual documents and intended travel for each person. A revised company schedule does not itself alter an admission period or grant a family member status.
Check the changes that matter to the household
Track the spouse’s valid L dependent status and appropriate spouse-specific I-94 evidence before relying on work permission. For an unmarried child under 21, check continuing dependent eligibility separately from school dates; that child does not receive the spouse’s employment authorization.
A spouse in L-2 status is employment-authorized incident to status and may work without first obtaining a separate category. A revised assignment schedule can affect several documents at once, including the employer's own confirmation letters, the family's proof of relationship, and any school enrollment records tied to a specific date. Build a checklist triggered by every schedule change rather than waiting until a filing deadline actually approaches on its own, since updates are always easier to request calmly than under sudden time pressure later on. Ask the employer's immigration contact which specific documents need reissuing after any date change, because not every record is affected the same way and some remain valid despite the new schedule. Confirm that every family member's paperwork was actually updated, not only the principal's own file, since a revised date for one person does not automatically update another person's separate record.