No. TD eligibility for a child requires being unmarried and under 21. A parent’s longer TN period does not remove that condition. Have counsel assess the child’s own options and timing before relying on a school plan extending beyond the birthday. Order matters more than the calendar here. The employer’s confirmed period sets the parent’s TN request; the parent’s admitted period sets the TD window; the child’s age then either fits inside that window or does not. Work through those three in sequence, because a decision taken out of order is rarely reversible.
Read age and status dates together
Keep the birth record and current admission documentation in the same review set. If a printed date extends beyond the birthday, raise the conflict instead of assuming it creates an exception. The review should produce a plan for the child, not merely another parent renewal.
The governing condition is narrow: TD is available to the spouse and to unmarried children under 21 of a TN principal, and reaching 21 or marrying ends it on its own terms. Nothing the employer, the school or the parent does afterwards restores it. Ask counsel what the child would need to hold instead, and what must be filed or requested while the current status remains valid rather than after it lapses.
The distinction between an extension of the parent’s status and a new status for the child is the one the file must make plainly.