For reissue applications filed before September 16, 2012, all references to 35 U.S.C. 251 and 37 CFR 1.172 , 1.175 , and 3.73 are to the law and rules in effect on September 15, 2012. Where specifically designated, these are “pre-AIA” provisions. For reissue applications filed on or after September 16, 2012, all references to 35 U.S.C. 251 and 37 CFR 1.172 , 1.175 , and 3.73 are to the current provisions.