移民局文件中给出84天（Per "Case Management Timelines" http://www.uscis.gov/files/pressrelease/casemgmt.pdf, item "Request for Evidence(RFE)" indicates that "An extension of the standard RFE timeframe caanot be provided, nor should we repeat requests for the same evidence". In addition, it also mentions that when sending an RFE, all other applications except N400-consist with 8 CFR 103.2(b)(8)-(15), customers are given 12 weeks (84 calendar days) to respond. ），是吗？谢谢！