这句话里的family-based category是指当初我领导申请绿卡的途径，而不是我这次follow-to-join。 这句话我是这样读的：我交４８５ as “Spouse （我）...of an immigrant (领导） who ... has been granted Lawful Permanent Residence through a Family Sponsored Visa category that allows derivative status for spouses (我）..."
也就是说，如果当初领导through a Family Sponsored Visa category 被granted Lawful Permanent Residence，而且这种category 又allow derivative status for spouses 的话，我就可以在此作为spouse交４８５。
但因为当初领导是通过employment获得的绿卡，不是Family Sponsored，所以我不确定这条是否适用我？
-You may mail it to the address based on EB category (e.g. Dallas or Phoenix) or even Chicago based on FB category. Because all of these addresses are the USCIS mail collection stations, and they will forward your application materials to the correct USCIS Service Center (e.g. TSC or NSC) for processing.
也就是说，如果当初领导through a Family Sponsored Visa category 被granted Lawful Permanent Residence，而且这种category 又allow derivative status for spouses 的话，我就可以在此作为spouse交４８５。
但因为当初领导是通过employment获得的绿卡，不是Family Sponsored，所以我不确定这条是否适用我？
-You may mail it to the address based on EB category (e.g. Dallas or Phoenix) or even Chicago based on FB category. Because all of these addresses are the USCIS mail collection stations, and they will forward your application materials to the correct USCIS Service Center (e.g. TSC or NSC) for processing.
