The investor, the spouse and unmarried children whose age for immigration purposes is under twenty-one may obtain conditional permanent residence together. The Child Status Protection Act may protect some children who turn twenty-one during processing; marriage ends derivative eligibility.
Plan the whole file around the earliest birthday
Derivative eligibility is measured against age and marital status, and the twenty-first birthday determines many family timelines. Statutory age-out protection can help in some circumstances by subtracting processing time from a child's age, but it is a calculation rather than a guarantee, and no family should build a plan on the assumption that it will apply. Write down each child's date of birth at the outset and work backwards from the earliest one. Conditional residents may work and study without a separate authorization, which distinguishes this route sharply from the temporary categories where dependants cannot work at all. The condition on residence applies to the family as it does to the investor, so the later petition to remove it covers everyone. An adult child outside the age limit needs an independent route considered on its own merits.
Hypothetical example: an indoor-aquaculture business owner has a spouse, a twenty-year-old child, and a married child of nineteen. The first review should create a dated family table with relationship evidence, marital status, passport information, and age calculations for every proposed derivative. Birth and marriage records settle eligibility facts; the filing and visa timetable supplies the relevant dates. Make inclusion decisions before committing to a project. The common error is treating financial dependence or a shared address as a substitute for the statutory derivative rules, which they do not change.