美國依親移民,  兄弟姊妹的關係辦依親, 第四優先F4

First: (F1) Unmarried Sons and Daughters of U.S. Citizens:  23,400 plus any numbers not required for fourth preference.

Second: Spouses and Children, and Unmarried Sons and Daughters of Permanent Residents:  114,200, plus the number (if any) by which the worldwide family preference level exceeds 226,000, plus any unused first preference numbers:

A. (F2A) Spouses and Children of Permanent Residents:  77% of the overall second preference limitation, of which 75% are exempt from the per-country limit;

B. (F2B) Unmarried Sons and Daughters (21 years of age or older) of Permanent Residents:  23% of the overall second preference limitation.

Third: (F3) Married Sons and Daughters of U.S. Citizens:  23,400, plus any numbers not required by first and second preferences.

Fourth: (F4) Brothers and Sisters of Adult U.S. Citizens:  65,000, plus any numbers not required by first three preferences.

On the chart below, the listing of a date for any class indicates that the class is oversubscribed (see paragraph 1); "C" means current, i.e., numbers are available for all qualified applicants; and "U" means unavailable, i.e., no numbers are available. (NOTE:  Numbers are available only for applicants whose priority date is earlier than the cut-off date listed below.)