A person applying for immigration benefits can have their spouse and unmarried children under the age of 21 join them depending on the type of immigration benefit they are applying for. In family relatable immigration, when the applicant completes the rest of the I-130 (Petitioner for Alien Relative), other family members who are in the U.S. and have an immigrant visa can file I-485 (Application to Register Permanent Resident or Adjust Status) to adjust their status to permanent residents. For family members outside the United States, there is a waiting period for the NVC to process the visa together with an immigrant visa to the US embassy or consulate which enables the person to become a permanent resident of the United States. Immediate relatives of green card holders  can qualify for family based immigration under the F2A (spouses and children) and F2B (unmarried adult children), but must wait for the Visa Bulletin, just like with most immigration processes.