45 CFR § 160.504 - Hearing before an ALJ.
(1) The respondent; and
(2) The officer(s) or employee(s) of HHS to whom the enforcement authority involved has been delegated.
(b) The request for a hearing must be made in writing signed by the respondent or by the respondent's attorney and sent by certified mail, return receipt requested, to the address specified in the notice of proposed determination. The request for a hearing must be mailed within 90 days after notice of the proposed determination is received by the respondent. For purposes of this section, the respondent's date of receipt of the notice of proposed determination is presumed to be 5 days after the date of the notice unless the respondent makes a reasonable showing to the contrary to the ALJ.
(c) The request for a hearing must clearly and directly admit, deny, or explain each of the findings of fact contained in the notice of proposed determination with regard to which the respondent has any knowledge. If the respondent has no knowledge of a particular finding of fact and so states, the finding shall be deemed denied. The request for a hearing must also state the circumstances or arguments that the respondent alleges constitute the grounds for any defense and the factual and legal basis for opposing the penalty, except that a respondent may raise an affirmative defense under § 160.410(b)(1) at any time.
(d) The ALJ must dismiss a hearing request where -
(1) On motion of the Secretary, the ALJ determines that the respondent's hearing request is not timely filed as required by paragraphs (b) or does not meet the requirements of paragraph (c) of this section;
(2) The respondent withdraws the request for a hearing;
(3) The respondent abandons the request for a hearing; or
(4) The respondent's hearing request fails to raise any issue that may properly be addressed in a hearing.