A party may: Appear in person to the extent permitted by law; or Be represented by an attorney licensed to practice law in Maryland. If a party or the party's attorney does not appear for the hearing and the presiding officer gave notice as required, the presiding officer may: Postpone the hearing under Regulation .05 of this chapter; or Proceed upon the evidence and testimony submitted by those present. Testimony and Evidence. The presiding officer shall conduct the hearing as it relates to testimony and evidence according to the rules under State Government Article, §§10-213 and 10-214, Annotated Code of Maryland. Testimony shall be under oath. The oath shall be: “Do you solemnly promise and affirm under the penalties of perjury that the testimony you are about to give in the matter now pending before the agency shall be the truth, the whole truth, and nothing but the truth?”