" FBI rules require that a 302 report be prepared within five days of an interview."
https://www.redstate.com/elizabeth-vaughn/2018/12/15/submission-judge-sullivan-mueller-omits-original-fbi-302-report-flynn-interview-submits-302-prepared-six-months-later/
I've always read that 302's have to be written within 5 days per FBI rules… if that is true, this 302 still isn't legal.