(a) The Department of Education shall ensure that not later than forty-five (45) days after the expiration of the thirty-day period under 34 C.F.R. § 300.510(b) and 6 CAR § 130-1011(b), or the adjusted time periods described under 34 C.F.R. § 300.510(c) and 6 CAR § 130-1011(c):

1. (1) A final decision is reached in the hearing unless the hearing officer has extended the timeline; and
2. (2) A copy of the decision is mailed to each of the parties.