45 CFR § 1149.19
What happens once an answer is filed?
April 14, 2021
(a) When the reviewing official receives an answer, he/she must simultaneously file the complaint, the answer, and a designation of the NEA's representative with the ALJ.
(b) When the ALJ receives the complaint and the answer, he/she will promptly serve a notice of hearing upon you and the NEA representative, in the same manner as the complaint. At the same time, the ALJ must send a copy of such notice to the reviewing official or his designee.