If you are a permanent resident (Green Card holder), your spouse, child (unmarried and under 21), or the child of your spouse (your step-child) may be eligible for a V visa if:
You filed Form I-130, Petition for Alien Relative, for your family member on or before December 21, 2000. This includes children (unmarried and under 21) listed on the petition.
The family member has been waiting at least 3 years since you filed the Form I-130.
The immigrant visa is not available on an approved Form I-130 petition OR the application to adjust status is pending OR the petition for an immigrant visa is pending.