Originally posted by 6th-year
http://www.murthy.com/UDac21qa.html
Question 1 : Is it the receipt date or the notice date that governs the counting of the 180-day period under AC21? TOP
Based upon the wording of the law and the INS interpretation of AC21, the 180 days should be counted from the date the INS receives the filing at one of its Service Centers. This is not the notice date, which reflects the several days or weeks the INS takes to issue the Receipt Notice. The 180 days are calendar days, not business days.