Under the published terms the spouse and unmarried children under 21 may join, each with their own fee and gift as stated on the official page; a daughter who is 23 is not a dependant and would need her own application or another route.
Spouse and minor children join; adult children do not
The official FAQ, as checked on September 7, 2026, describes the individual gift as applying to the principal and to each joining spouse or unmarried child under 21, with the processing fee charged per applicant. In the hypothetical, the husband would join as spouse with his own fee and gift.
Their daughter, who is 23 and works as a veterinary technician in Gatineau, is outside the dependant definition entirely; the program is not a family sponsorship and does not extend to adult children, so if she wants to move she must qualify on her own, whether as a Gold Card applicant in her own right, through a TN profession if one fits her qualifications, or otherwise. Their son, who is 17, would join as a child, but his age at the time the family completes the process matters: derivative eligibility ends at 21, and whether any age-protection rule applies to this program should be confirmed on the official page rather than assumed from EB-5 practice.