Within fifteen (15) days after a complaint has been received by the Board, the Administrator shall serve, or cause to be served, in person, or by certified mail, a copy of the complaint on the person (hereinafter referred to as "respondent") alleged to have violated Section 173.04. Along with the service of the complaint, the Administrator shall advise the respondent in writing of his procedural rights and obligations pursuant to this chapter. The respondent may file with the Board an answer to the complaint.