Is there an age-out protection for derivative family members in T Visa cases?
Yes. The age-out protections will be in place as long as the T visa is filed prior to the derivatives’ age cut off. 8 CFR § 214.11(k)(5)(ii) & (iii).
For additional information, see USCIS Interoffice Memo Re: Trafficking Victims Protection Reauthorization Act of 2003.